Starting programs on local x through telnet

[Micha Feigin]

Is it possible to start programs needing x to run through the net (telnet,
rlogin ...). How do i tell them to use my screen?
The program tells me its starting (it has a text output) and then doesn't
do anything else (it's suposed to have a graphical interface). The remote
system is a unix (one of the computers is running linux but it doesn't
have all the relevant programs).
Thanx