If you have a active clan, with good amount of members, you can request to have a sub-section for your clan on this forum.
To Request to have your own clan section made, making the following post.
1) Make a Topic with the subject as "[Request Clan Section] YOURCLANNAMEHERE"
2) In that topic tell me your Clan's Name, how many members you have
3) Tell us what usernames you want to add to the moderator list
3) Tell us anything else about the clan you wish
Later on we'll be providing hosting for clan sites with SC2 templates.