diff --git a/app.py b/app.py
index 3e87d01..1ec8c77 100644
--- a/app.py
+++ b/app.py
@@ -452,15 +452,22 @@ def api_posts():
             if user_communities:
                 post_source = post_data.get('source', '').lower()
                 post_platform = post_data.get('platform', '').lower()
+                post_id = post_data.get('id', '').lower()
 
                 # Check if this post matches any of the user's selected communities
                 matches_community = False
                 for selected_community in user_communities:
                     selected_community = selected_community.lower()
-                    # Match by exact source name or platform name
+
+                    # Enhanced matching logic (platform-agnostic):
+                    # 1. Exact source match (e.g., source="programming", community="programming")
+                    # 2. Platform match (e.g., platform="hackernews", community="hackernews")
+                    # 3. Partial match in source (e.g., source="programming", community="program")
+                    # 4. Partial match in post ID (e.g., id="reddit_programming_123", community="programming")
                     if (post_source == selected_community or
                         post_platform == selected_community or
-                        selected_community in post_source):
+                        (selected_community in post_source) or
+                        (selected_community in post_id)):
                         matches_community = True
                         break