Possible to restrict access to settings without password?

Is it possible to allow people to use the LMS web interface to play music etc, but not change settings without a password? Not that I don't trust my family, just that I'd rather not have to wonder if something has been changed when things go wrong!

Related: what is the best way to allow other family members to play music through LMS - is it to use the web interface, or something like ipeng on mobile, or something else?

Thanks!