I'm using: wordpress 3.6.0 with multisite, twenty therteen

Hi,

I'm using: wordpress 3.6.0 with multisite, twenty therteen theme and latest version of pro-site plugin.

Situation: After a user register into the website (www.domain.com) and choose a subdomain, (for example user.domain.com) he results to be registered two times, as subscriber in http://www.domain.com and as Administrator of his subdomain user.domain.com.

I need that every user when do the login into http://www.domain.com will redirect to the dashboard of his website (user.domain.com),
I don't wish the user is a subscriber of the main website, I need only he can access to his subdomain admin dashboard.

Is it possible to have this?

Thank you very much!