More Thoughts on Digital Identity

Your thoughts on this will be particularly helpful.

Is your Digital Identity only able to move sideways?

Here is what I am trying to get a handle on. In the social networks I have used I am able to invite in friends or be invited. Then we can share things back and forth.

In a business setting this allows me to share with my co-workers. That way anyone who takes a call can help the customer. That is a good thing as far as it goes.

But what if I am responsible for the group. Can I see everything going on in my group without letting the group see everything I am doing?

To me that would be allowing Identity information to move sideways in the group and allowing it to move upward into the manager.

Now what if I wanted to allow access to part of my Digital Identity, but not all of it, to be shared with my group and one specific person not in my group. 

To me that would be moving Identity information sideways and down.

Do any of you who use social networks have any thoughts on this. Can the networks you use now do this type of thing?

Thanks for any feedback.