Facebook Like User Activity Stream for BuddyPress features

Aggregating and Providing a familiar page to users where all the relevant social activities are aggregated
Clicking on Username automatically redirects to His/Her stream
And yes, It limits the view to logged in user for their own network, just like the other social networks do
All Activity tab in directory can be converted to list only user’s own network(user friends, following, groups) updates in one stream.