Plugin for login to a specific page

Have you had a look at wp_login_form? There’s no reason why that shouldn’t work with a lightbox plugin.

How do I use wp_login_form? Is it also a plugin? Should I embed the code in your link in my page?

wp_login_form() is a PHP/WordPress function that can be added to a theme template file.

ok, thanks! How do I combine it with lightbox? Isn’t there any plugin that do the whole thing?