Merge BuddyPress activity between two WordPress installs

Hi there and sorry for my bad english !

I'm running two WordPress Multisite installs (One for my company and one for user's blogs)

These two installs shares the same user and usermeta tables, so users are exactly the sames on the two networks.

Is there a way to merge BuddyPress activity of the two networks ? Can I use the same BuddyPress DB tables ? Just like I'm using the same user tables.

Thanks for you help !