All I know is that unlike in the UK, you have to apply to each college directly, it doesn't go through a central standard like UCAS. you can technically apply to as many as you'd like, though since you'll be making a separate application for each its more a case of how much time and energy you can spend on it.
As applications are organised by colleges individually I think it would be best to check the deadlines with the ones you'd like to apply to, as they're likely to vary. They might also have addition requirements like an entry test, interview or certain documents for international students