BuddyPress.org

Thanks for the comment David. I agree for a very robust solution a custom taxonomy would fit the bill. However a bare bones implementation might just use the group meta table.

I checked out this older plugin: BuddyPress Contents (https://wordpress.org/extend/plugins/bpcontents/installation/) which has serious tag and category support however it is no longer in development. But maybe i’ll dig in the code and see how he implemented it and try to salvage the parts i need.