How do I make camera not render specific lights?

Im Making a simulation based around the book "Flatland", I made a game with 2 players that each one of them has a camera and a spot light on its front so they can see closer stuff brighter (like the in book), but when the two players look at the same spot the two lights mix together, I think the solution is to make each camera see its light, but I dont know how to do it. (I tried putting the each light in different layers) Can someone please help me one this? (btw im making it 3D instead of 2D)