It's good to clarify that when people make a SocialWally (Single), they'll get a link in a browser. This SocialWally link can be shared on endless amount of screens (any screen connected to a pc with a chrome browser). But if you would like different content on different screens (so Twitter on one screen and Facebook on another screen), you'll either make a new account of upgrade to SocialWally Multi (up to 5 SocialWallies). With the Multi account you can start and manage up to 5 SocialWallies for different clienst, in case your an agency.
There is no difference in the apps or other features between Single or Multi.