There isn't a need to worry if you do 2-3 from the same IP. What you need to make sure of is that you are registering different people with real addresses, as I'm sure they will be looking for that kind of thing. If you want to register your whole family, it probably wont be a problem. If you start making up names and fake addresses, that will be a problem. Really though, you only apply once if you want to preserve your chances of getting in. There's no way of knowing how in-detail their process of determining fake or multiple applicants is. There is also no way of knowing what type of applicants they are looking for.
Edited, Dec 18th 2009 3:57pm by xxsidekickxx
"It's a magical world, Hobbes ol' buddy. Lets go exploring."
Just for clarification, I bot, sell gil, buy gil, MPK, party naked through the dunes, power level, play as a Ranger, quit when they nerf it and complain, play as a Beastmaster, quit when then nerf it and complain, make posts for and against RMT, monopolize NMs, create elitist groups, run casinos, steal gil, hack accounts, and stare at you awkwardly with my left eye.