Multi user synchronization

Hey Guys, what's up?

Guys, I'm making a project involving four different sites running BuddyPress, and a fifth site in which all users of the four sites will be synchronized, ie, the fifth site will have all users of the other 4 sites. It must be so because the requirement to become user of the fifth site is to already be a user in one of the other four, so, the normal registration on the fifth site is not allowed, you just can log-in by using your login informations of one of the four sites you are a member.

I can synchronize the users of four sites in the fifth with this plugin?

Thanks

Derek Melo