Hi Iskander,
I can think of two ways you can find the IP addresses of the Remote computers. If you are talking about LabVIEW Real-Time, there is an inbuilt VI called "RT Ping Controllers" which will return the IP addresses of your remote systems. If you are not using LVRT, take a loot at this
Discussion Forum. The other way that I think will work your you is to use system exec or TCP/IP to ping your remote systems and verify their IP addresess.
I hope this helps,
Regards,
Nadim
Applications Engineering
National Instruments