Remote Desktop in a Peer to Peer network

You need to configure your router to forward port 3389 to the computer you want to connect to and enable Remote Desktop on that computer.

what do I enter into the remote desktop prompt on the remote computer? The name of the computer, the workgroup, the ip address of the computer i am trying to reach or the ip address of the router?

Presumably your work network uses a router witha  public IP Address - you need to configure the router to forward port 3389 to the (presumably) private IP address of the workstation (private IP's often start with 192.168.x.x or 10.x.x.x).  Then you cannot enter a private address from a computer at home - private means only the internal network can talk to it.  So you would enter the public IP address that the router uses.  From work, go to www.whatismyip.com to find out what IP that is.

Can I set the router to forward port 3389 to multiple internal ip addresses?

No - how would the router know which one you wanted?

Depending on the router , you may be able to forward different ports to different computers, but a better MORE SECURE solution is to setup a VPN.

How would I do that in a peer to peer network.

This was supposed to be under networking

What is "that"?

Create a VPN?  Or forward different ports?

As I've already stated about the ports, it depends on your router (which you haven't provided any details on).

Im sorry What I ment to say was how do I create a VPN in this situation. I know how to forward ports on the router.

Thank you I will try that as soon as I get a chance.