At minimum, you would have to create a password protected page and add the specific gallery to that page for each user. This can be accomplished using Security Assist with PowerGallery. Then you would have the user register to the site. On the photographer's end, you would have to enter the username (or have a dropdown list of available users) and a gallery to show. On the client's pages, you would need a recordset that contains all the urls to the galleries you want shown for that user and a looping display area to show the galleries.
