Posting Comments/Updates to Facebook user wall

Hi All,

So I need to post comment/update to facebook user wall. For example, user Joe logs into my buddypress website via his facebook account and they make a comment on the active stream can I post the comment to their facebook wall and how?

Also how can programmatic send a text to post on the facebook wall of the user logged in? For example, we have a custom php code that ask the user to create a life goal which gets posted on: personal goal list, public goal list (if they want to) and on the active stream of buddypress. How can i pass that same text to the user's facebok wall.

We are using Ultimate Facebook plugin and it has Auto posting but it posts only to the main user.

Any plugins or code you can recommend. Thanks