It's not really legal to do, as there isnt a game mechanic that supports it. However you can set up a string that would allow this to some degree. What you need is:
1.) Assist the toon that got the target you want to face.
2.) Interact with target
3.) A key stroke that peddles your toons back so to stop it from running to the target.

Just bind those 3 to a sequence when you press one key and there you go, pretty easy to setup.