BuddyPress.org

I have a BuddyPress social networks in a multi network WordPress install (WordPress multisite), thanks to LH Buddypress Multi Network plugin.

Everything is up to date.

How can I prevent people from accessing to a profile page from another blog?

For example :
teacherSite, teacherUser
studentSite, studentUser

I have restricted access to site for non-member.
teacherUser can only connect on teacherSite.
And he can’t see in the directory other users from others blogs.

If studentUser knows the teacherUser username or if he finds or tests…

He can go to studentSite.domain.com/members/teacherUser/, and he can see the profile of teacherUser even though teacherUser is not linked to studentSite.

Fortunately, there is no information (because everything else is well segregated) except the name and the gravatar.

But he can still make a connection request or send him a private message!
teacherUser will not see any notification on teacherSite. But he will potentially receive an email which will redirect him to studentSite without being able to connect to it.

How to avoid this?

If you know, you are a master!