How can I trap a cat without catching a skunk?

There's a stray cat hanging around my college campus, and I would like to try and catch it before the weather gets too extreme. I've looked at many live-catch traps, but there is a large population of skunks around as well and I'd prefer not to catch one of them. Any advice would be great- is there any sort of bait that would attract cats but not skunks? Or a trap that would deter them?