Noob: layer lighting

I’d like to isolate one object to one light (e.g. the one rooster gets the red light, the seven chickens get the yellow light). I tried making 2 groups of lights and applying the lights to their respective objects (Shaders > GR > Exclusive) but that didn’t work. So I’m wondering if there may be a layer-type of solution?

I think you may be able to have the light only affect objects in a common group. It should be a button like the layer button, but I’m not sure about this! Shift+G to add to an object to a group.