Board Thread:Support Requests - Designing Your Wiki/@comment-43491554-20200427142044/@comment-9605025-20200427164501

The reason it didn't work is because your selector specified links to your user page but the links in message wall posts are to message walls. All you need to do is replace "User" with "Message_Wall" and it should work. One thing to note is that this form will change all links to message walls, not just the ones on message walls.