Is there any way to make a lan server to connect PS3s?

i m making a gundam extreme vs tournament
and i wanna know about how to connect PS3 in local server
although i can host the tournament by connecting the PS3 with internet
it would be better if i can set up for lan

Not sure if you can with the PS3 version.

Far as I know there is no PS3 games that support Local lan connections like that

You might want to hit up the tech support on The PlayStation Community forums

i will check it out