There is only one clan/community, and that is EdgeGamers.
If you have applied and been accepted to one of our games, you are a member in all of the games.
The only thing I would suggest however is, If you applied to the CoD division, and plan to play in the source-games divisions (TF2, CSS, DoDS) then take the time to get MAUL verified, by clicking the MAUL icon at the top of the page and going through the instructions there. This is not directly required, but it can help you later down the road when/if you get promotions.
But you are a member of all of EdgeGamers.