mouse tracking

So I have a project that i want to stream but that needs two apps that are both full screen and i would like to have one on each of my monitors. Is there any way to have obs record/stream the display i currently have my mouse on?

I have an ultrawide monitor (2560x1080), I have the habit of making lives and videos in windowed mode from any application, and the mouse tracking is always wrong in the videos and during the live, the only time the tracking is not wrong is when I put the application window in the upper left...