A way to protect content

Hi, I am using Pro Sites and am looking for a simple way to protect some (not all) content that is installed on the main domain.com. Eg, the global site search plugin, blogs directory, etc.

These are things that I have tested so far...

Membership plugin doesn't integrate with Pro-sites (yet)
Global site search plugin & blogs directory won't install on sub domains.
Sitewideprivacy is great for sub sites but not for selecting some content on the main site.
I can "no index no follow" the page but any non member with the URL can find the content.
Post Visibility doesn't allow certain roles or members to view.