BuddyPress

Is there a way to do this so I can show topics and reply’s to them in a different way to regular activity updates?

Please don’t replicate topics. http://buddypress.org/community/groups/how-to-and-troubleshooting/forum/topic/group-activity-by-keyword/

You need to be more specific on what you are trying to do, I can’t understand what you are saying.