Would love to see this, been asking for it for a few years via the help email address. It comes up all the time for us and it would be good to do everything all in one program rather than buying a secondary app just for this use case. 

Edit: Sometimes we are in a position where there is no out-side world internet at all so pure direct control over local is also something I'm asking for. 

I agree this is a much needed feature. We use ScreenConnect to manage and control dozens of machines. Sometimes we need remote access without internet when we're on the ground trying to set things up (most of our machines operate video walls and thus operate heedlessly) and it would be great to have this feature. The only reason we need another program (and pay for it) is that it supports local VNC from any system that supports VNC (Mac, Windows). Seeing that this request has been around for four years and has more upvotes than some approved and developing features is too bad.