By default, Program Files is not writable by non-Administrators. This is likely done by some background service. Or they loosened the default file permissions (which would be dumb).
No reason this can't be done on Linux but since NT's security model is more flexible it's a lot easier to do so on Windows. You'd need to add dedicated users. (Running a Steam daemon as root would probably cause an uproar.)
No reason this can't be done on Linux but since NT's security model is more flexible it's a lot easier to do so on Windows. You'd need to add dedicated users. (Running a Steam daemon as root would probably cause an uproar.)