Multiple Passwords for Protected Pages is a WordPress plugin by juliobox that allows WordPress site owners to add passwords as many as needed on every protected page.
If you are logged as admin or the page’s author, you won’t need to enter password.
If you set a list of child pages, just change any password (parent page or any child) and all the password for the hierarchy will be updated!
This plugin allows you to protect page and give your client a personnal password.
Download: http://wordpress.org/extend/plugins/baw-multiple-pass-for-protected-pages/
