Is there a way to give users a logout function after they have entered their password and have gained access to the page.

I currently have a page URL blocked with a password.  This gives the user access to the page.  However, if the user leaves the page the user session is stored and they always have access to the restricted content.  This is good BUT what if the user leaves their computer and someone else sits down.  That other person would now have access to the restricted content.  

Is there a LOGOUT ability with this extension?

Thank you,