Maps for 3 or 4 teams

[Rock]

Some of you may have seen this post on fpsbanana where different skins are possible for the players as well as some of the equipment.

http://www.fpsbanana.com/skins/games/297

I've seen several posts about mappers looking for ideas for maps. Since it's possible to distinguish players by more than just red and blue, is it possible to create a map for up to 4 teams? CTF or Death Match or King of the Hill or ???

http://i81.photobucket.com/albums/j207/skipatc/All-in-Rock.png

[spaceweasels]

It used to be possible with TFC, but TF2 is currently coded with just red and blue.