adding client login to light box help

Hi again. I was wondering how i can add a client login to this page. i did published it to adobe BC. But i am trying to figure out how to make the light box secure. now under the test light box i am trying to add the log in. . now once the login is complete then it goes to the box its self.  so the client has to login before the click on the light box.

here the page.

Clients

here an example but this site is in list view. i ma looking at thumbnail view

Leo Patrone Photography