clicker training cats?

is there a way i can clicker train two of my cats at the same time ?? when i pet one the other has to come instantly same with food ..treats etc. theyre both very loving but JEALOUS cats ..so i was wondering how i could clicker train them. i know for a fact that if i have treats out they would be pushing eachother and even growling to get the first bite ..the get overly excited and lose focus on everything ..also they get extremely sad looking and jealous if one gets more attention than the other …would putting one cat in a different room for a little… while i have a clicker trainging buying prescription drugs class with the other make them jealous? …we have a small apartment so they could def hear ..any suggestions on how i could try this?