diff --git a/src/spaceone/notification/manager/identity_manager.py b/src/spaceone/notification/manager/identity_manager.py
index 8a08496..e22e875 100644
--- a/src/spaceone/notification/manager/identity_manager.py
+++ b/src/spaceone/notification/manager/identity_manager.py
@@ -40,6 +40,24 @@ def get_resource(self, resource_id: str, resource_type: str, domain_id: str):
                 get_method["dispatch_method"], {get_method["key"]: resource_id}
             )
 
+    def get_project(self, project_id: str, domain_id: str) -> dict:
+        system_token = config.get_global("TOKEN")
+        return self.identity_connector.dispatch(
+            "Project.get",
+            {"project_id": project_id},
+            x_domain_id=domain_id,
+            token=system_token,
+        )
+
+    def get_workspace_users(self, workspace_id: str, domain_id: str) -> dict:
+        system_token = config.get_global("TOKEN")
+        return self.identity_connector.dispatch(
+            "WorkspaceUser.list",
+            {"workspace_id": workspace_id},
+            x_domain_id=domain_id,
+            token=system_token,
+        )
+
     def get_user_profile(self):
         return self.identity_connector.dispatch("UserProfile.get", {})
 
@@ -54,10 +72,9 @@ def get_all_users_in_domain(self, domain_id: str) -> list:
             "state": "ENABLED",
         }
 
-        if self.token_type == "SYSTEM_TOKEN":
-            response = self.identity_connector.dispatch(
-                "User.list", query, x_domain_id=domain_id
-            )
-        else:
-            response = self.identity_connector.dispatch("User.list", query)
+        system_token = config.get_global("TOKEN")
+        response = self.identity_connector.dispatch(
+            "User.list", query, x_domain_id=domain_id, token=system_token
+        )
+
         return response.get("results", [])
diff --git a/src/spaceone/notification/service/notification_service.py b/src/spaceone/notification/service/notification_service.py
index 99cd831..b85b5d2 100644
--- a/src/spaceone/notification/service/notification_service.py
+++ b/src/spaceone/notification/service/notification_service.py
@@ -109,6 +109,7 @@ def dispatch_project_channel(self, params: dict):
         project_ch_mgr: ProjectChannelManager = self.locator.get_manager(
             ProjectChannelManager
         )
+        identity_mgr: IdentityManager = self.locator.get_manager(IdentityManager)
 
         domain_id = params["domain_id"]
         topic = params["topic"]
@@ -160,13 +161,34 @@ def dispatch_project_channel(self, params: dict):
 
                     if protocol_vo.protocol_type == "INTERNAL":
                         internal_project_channel_data = prj_ch_vo.data
+                        users = []
                         for user_id in internal_project_channel_data.get("users", []):
+                            if user_id == "*":
+                                project_info = identity_mgr.get_project(
+                                    project_id, domain_id
+                                )
+                                project_type = project_info["project_type"]
+                                project_users = project_info.get("users", [])
+                                if project_type == "PRIVATE":
+                                    users += project_users
+                                else:
+                                    response = identity_mgr.get_workspace_users(
+                                        project_id, domain_id
+                                    )
+                                    workspace_users = response.get("results", [])
+                                    users += workspace_users
+                            else:
+                                users.append(user_id)
+
+                        users = list(set(users))
+                        for user_id in users:
                             params.update(
                                 {
                                     "resource_type": "identity.User",
                                     "resource_id": user_id,
                                 }
                             )
+
                             _LOGGER.debug(
                                 f"[Forward to User Channel] User ID: {user_id}"
                             )