It's basically an NFG (non-faction group). Players take the initiative to organize themselves around some cause they deem worthwhile. If you have something in mind and don't really know what resources might be useful or if you just want to gauge interest, you could open a post on the forums about it to discuss it with the rest of the community. The General Talk forum would probably be a good starting point. SWC has no features that support this, though, and it is solely an independent effort. But if you are looking to create a society around a specific race or homeworld, you may also want to look up the homeworld or planet on the galaxy rules to determine which faction governs it, as they may be willing to help you out a bit, depending on your plan.
You don't need control/space on the homeworld to make a sociey for your race. All you need is a group of active players who enjoy meeting and planning on how to help new players from your race. You are limiting yourself to what the game design offers. Expand beyond the server's box.
you can, example, make a topic on the commerce forum about a geonosian society, explains what you expect from it, your services for the geonosian community and your desires about, etc. it's up to you !
yeah i was thinking about making my store a geonosian clan and making 3 branches. The military would be called H.I.V.E The economy would be The Oddball Consortium [and any other geo owned stores] And the high ranks would be called the aristocracy.