Deny access to website for non registered IP addresses

Hi

I am looking for a plugin where it is possible to collect and connect Usernames and IP adresses (as yours). At the same time, I need that plugin to deny access for not registered users/IP adresses. So everybody that are registrered users, without having to go through a login process, can access the site, and not registrered users cant access the site at all. Is that a feature your plugin has? Or know of a plugin that does that and is compatible with your plugin (as I am still interested in the login history)?
And can your plugin even gather the information it does now without a standard login function?

Thanks in advance.