If you read the link provided in my previous post regarding
WordPress multisite it will explain more about how it works. If you have 4 of our themes set up on such a network, then yes your users can have a single login for all themes. None of our themes are multi location capable in the way you describe, so again as mentioned, this would involve multiple installations and customization in order to achieve a similar result. We do not have official documentation for this kind of setup as it is technically going to require customization which is not officially supported (i.e. you would need to do this yourself), but yes technically it can be done, and has been done by other members of our community.
ClassiPress does not have a user review setup at this time, and although we have a rating plugin available in the
AppThemes marketplace, it is currently not linked to the user, however we have inquired with our development team if this may be a possibility for the plugin in future. We hope to post a response relating to this on the plugin page soon. Thanks.