Hello
I have created a program that allows users to compete for some prize I wish to allow two users to be able to run one program these users must run must work in groups and will be using different computers. the problem is that i dn't klnow how to get them both to play or compete over the same file simultaniusly by using the INTERNET

I see you are a fellow rookie, so I will GIVE your the rookie answer.
There is a thing in Windows XP called "remote assistance" that lets two PEOPLE work on one computer with one person being far away on another computer that acts like a remote terminal. I have done this and it is real cool. The two people can send each other messages and get the same view on the desktop. The can even both use keyboards inside of any normal windows program. This is mostly used for giving help to someone.
And there are more involved things, like interactive gaming over the web. That is a special PROTOCOL that makes a Virtual Private Network between two users. But that is way above the rookie stuff. You might go into the gaming area and ask somebody there.