How can I selectively render Custom Depth Buffer effects in split screen?

Hi, I searched for an answer before posting this but couldn’t find a solution for my specific problem. I have a homing missile targeting system in the game I am working on and am using the custom depth buffer to outline my currently selected target. The depth buffer is working for what I want but since it is a split screen game I only want to display the highlight on the player screen who is using the missile. So I need a way to show post process on one screen but not the other. Also am unsure if I would need multiple post process volumes to make this work.