About: Social Jeev

>That means you cannot share users, logins, or other data across the sites (including access control).

I have my own code for this and could manage to access control. But what i need are these as mentioned in the original message :

( 1. Each level should have different set of plugins and themes which is meant for that particular member level only.
2. Also the privileges should also include custom domain usage, Upload Quota , limiting access to buddypress etc. )

Hope I get help with them