Okay so there are white, blue, green, yellow and red suits. Red and Yellow are easy: That's CLU and his henchmen, respectively. Pretty sure white is for users and user-aligned going by Sam's suit alone. It must also be a generally neutral color since so many programs have it and it's also just all over the place. But the others, I know, somehow correspond to programs as outlanders, user-aligned, grid warriors, etc. Anyone got the skinny on this?

Here's a link with good information about the different colours:

http://tron.wikia.com/wiki/Program