Two Headphones Monitoring and Recording

We need a feature to where if there is multiple headphones being used via splitter or any equipment you can choose whether or not you want to monitor someone’s vocals through both or one or the other pair of headphones right now it is default at two and I can’t seem to find a way. Example If I wanted to listen to my friend while he sings I only want to listen to his vocals through my pair of headphones and he only listens to the instrumental or through his pair of headphones or whatever we are doing.

Please don’t double post - that makes it very difficult to follow the discussion.
See here: