BuddyPress "post as" option for logged in users

Hello there,
I'm wondering how and if it would be possible to allow logged in users to select a type of post name.
Example - John can choose to post as "John" or "Anonymous" from a drop down when making a post or comment.
If this is possible, would it also be possible that the posting name "anonymous" (site-wide) not link to anything
when the action is made?

I'm willing to do whatever it takes to make this a possibility.