Yes, they can eat pork. Or any other meat.
I suspect that a diet of nothing but meat might not be enough, as wild cats also eat the guts of animals they catch, so get some vegetable food that way -- but a bit of meat as well as cat food is fine.
I had a cat once which liked mashed potato, and another which loved crisps and other salty snacks -- I'd not advise giving too much of those, but a few can't hurt.
I agree that you shouldn't feed animals off your own plate -- it makes them over-demanding, and fat. Food at meal-times.