Restrict Visibility by Room#1885

Our campus is set up where classrooms can only go to certain restrooms. I would like to have an only room option instead of the just the closest room option. This would allow me to restrict which restroom by classroom. Students change rooms throughout the day so I can’t restrict the student from that restroom because when their class changes, so does the restroom they use. I need to be able to restrict visibility from origin rooms.