Is there anyway to lock/password the program to stop your gorram housemates downloading files through limewire when you really really don't want them too?

It's getting pretty annoying and I'm not sure wether to use an outside program to help me, or if there is an option I can use within Limewire.

If you've ever had siblings/housemates/partners you'll know what I'm talking about.

Grrr.