If you mean you want to be able to see people who've also contributed to the map (Gders, hitsounds, storyboarders, etc), this is already doable. Type creator={xyz} {zyx}. The other contributors names should be in the tags, and in the diff name alot of the time if they made a guest difficulty, so searching their name after the "contributor" will limit it down to just the maps they have worked on together.