diff --git a/modules/appmodel/app-parser-generator.c b/modules/appmodel/app-parser-generator.c
index 21e0f4823d..8f7fe060b0 100644
--- a/modules/appmodel/app-parser-generator.c
+++ b/modules/appmodel/app-parser-generator.c
@@ -31,6 +31,7 @@ typedef struct _AppParserGenerator
 {
   AppObjectGenerator super;
   const gchar *topic;
+  const gchar *filterx_app_variable;
   GString *block;
   gboolean first_app_generated;
   gboolean allow_overlaps;
@@ -60,6 +61,13 @@ _parse_allow_overlaps(AppParserGenerator *self, CfgArgs *args, const gchar *refe
   return TRUE;
 }
 
+static gboolean
+_parse_filterx_app_variable(AppParserGenerator *self, CfgArgs *args, const gchar *reference)
+{
+  self->filterx_app_variable = cfg_args_get(args, "filterx-app-variable");
+  return TRUE;
+}
+
 static gboolean
 app_parser_generator_parse_arguments(AppObjectGenerator *s, CfgArgs *args, const gchar *reference)
 {
@@ -72,6 +80,9 @@ app_parser_generator_parse_arguments(AppObjectGenerator *s, CfgArgs *args, const
   if (!_parse_allow_overlaps(self, args, reference))
     return FALSE;
 
+  if (!_parse_filterx_app_variable(self, args, reference))
+    return FALSE;
+
   if (!app_object_generator_parse_arguments_method(&self->super, args, reference))
     return FALSE;
 
@@ -139,20 +150,23 @@ _generate_action(AppParserGenerator *self, Application *app)
   if (self->allow_overlaps)
     return;
 
-  if (app->filterx_expr)
-    g_string_append_printf(self->block,
-                           "            filterx {\n"
-                           "                meta.app_name = '%s';\n"
-                           "            };\n",
-                           app->super.name);
-
+  if (self->filterx_app_variable)
+    {
+      g_string_append_printf(self->block,
+                             "            filterx {\n"
+                             "                %s = '%s';\n"
+                             "            };\n",
+                             self->filterx_app_variable, app->super.name);
+    }
   else
-    g_string_append_printf(self->block,
-                           "            rewrite {\n"
-                           "                set-tag('.app.%s');\n"
-                           "                set('%s' value('.app.name'));\n"
-                           "            };\n",
-                           app->super.name, app->super.name);
+    {
+      g_string_append_printf(self->block,
+                             "            rewrite {\n"
+                             "                set-tag('.app.%s');\n"
+                             "                set('%s' value('.app.name'));\n"
+                             "            };\n",
+                             app->super.name, app->super.name);
+    }
 }
 
 static void
diff --git a/modules/appmodel/app-transform-generator.c b/modules/appmodel/app-transform-generator.c
index 7c04a2cb61..b806013e7b 100644
--- a/modules/appmodel/app-transform-generator.c
+++ b/modules/appmodel/app-transform-generator.c
@@ -29,6 +29,7 @@ typedef struct _AppTransformGenerator
 {
   AppObjectGenerator super;
   const gchar *flavour;
+  const gchar *filterx_app_variable;
   GString *block;
 } AppTransformGenerator;
 
@@ -41,6 +42,19 @@ _parse_transforms_arg(AppTransformGenerator *self, CfgArgs *args, const gchar *r
   return TRUE;
 }
 
+static gboolean
+_parse_filterx_app_variable(AppTransformGenerator *self, CfgArgs *args, const gchar *reference)
+{
+  self->filterx_app_variable = cfg_args_get(args, "filterx-app-variable");
+  if (!self->filterx_app_variable)
+    {
+      msg_error("app-transform() requires a filterx-app-variable() argument",
+                evt_tag_str("reference", reference));
+      return FALSE;
+    }
+  return TRUE;
+}
+
 static gboolean
 app_transform_generator_parse_arguments(AppObjectGenerator *s, CfgArgs *args, const gchar *reference)
 {
@@ -50,6 +64,9 @@ app_transform_generator_parse_arguments(AppObjectGenerator *s, CfgArgs *args, co
   if (!_parse_transforms_arg(self, args, reference))
     return FALSE;
 
+  if (!_parse_filterx_app_variable(self, args, reference))
+    return FALSE;
+
   if (!app_object_generator_parse_arguments_method(&self->super, args, reference))
     return FALSE;
 
@@ -82,7 +99,8 @@ _generate_app_transform(Transformation *transformation, gpointer user_data)
     return;
 
   g_string_append_printf(self->block, "\n#Start Application %s\n", transformation->super.name);
-  g_string_append_printf(self->block,     "    if (meta.app_name == '%s') {\n", transformation->super.name);
+  g_string_append_printf(self->block,     "    if (%s == '%s') {\n", self->filterx_app_variable,
+                         transformation->super.name);
   for (GList *l = transformation->blocks; l; l = l->next)
     {
       TransformationBlock *block = l->data;