If you mean external connection when you say "other side" yes you can do that.
I am doing that here at my office.
I have radmin loaded on one of my servers. and on the workstaitons. If I want to connect to one of my internal boxes from the outside, i set up 2 connections on my external machine. One for the server (using public ip) then one for the internal box with the netbios name and then on that connecting I select connect thru and select the public server.
I would strongly recommend that if you do this that you use a vpn connection if at all possible so you dont have to open port 4899 to the world.