actually, you can. I have a multisite installationa and I control all access to materials through a single blog. all a user has to do is login to the current site to have the appropriate permissions replied
ask me how I do it. haha
OK, I´m asking! This is what I need. We are making a course website, multisite WP and instead of having all the different courses on one site we want to have each course on a subdomain, accessible as a additional purchase (using Custom Capabilities) independent of membership level and for one level all those courses included. Problem is to handle users across the network so they don´t have to re-register or re-log in to access those sub-domains they have the right to view.
They will have no rights to create their own blogs so the blogfram solution is not applicable and also doesn´t handle users across the network if I understand correctly.
What´s the (stable!) workaround for this?
Been testing so far 4 plug-ins with no good result