Multiple Audio Running at Once

I’m working on a laptop with a secondary monitor. I’m looking for the secondary monitor sound to come out of auxiliary speakers, which I have done. The problem I am having is that I want different sound from the laptop screen to be playing in my headphones and I cannot seem to get it right for all applications. Is there a fix to this or software available? I have tried to assign audio through the stereo mix and that is not what I am looking for. I have also tried to assign audio through the app settings and that doesn’t seem to work. I’m looking for a one step fix all kinda solution. Thank you in advance!!