If something is confined to a particular place, it exists only in that place. If it is confined to a particular group, only members of that group have it. The problem is not confined to Germany These dangers are not confined to smokers. = restricted
A confined space or area is small and enclosed by walls. His long legs bent up in the confined space
If someone is confined to a wheelchair, bed, or house, they have to stay there, because they are disabled or ill. He had been confined to a wheelchair since childhood