No, I dont think so. But not sure what Threespeak does. The first tag in the post determines what community it goes into. When 3speak uses their tag as the first, then it'll go in 3speak community. When they allow some other tag to be the first one, then it'll be that tag defining the community. You can also upload your track to eg YouTube and create a post - linking in your YouTube track - in the community you like to publish in.