IP Tracking

Hi,

I know that ED logs an ip when a user creates a post but I was wondering if ES has any way of logging IPs that a user uses when they sign in or even register. The reason why I ask is that my community has a strict policy on signing up multiple accounts to one IP and I am using extra watch to track this but the plugin is quite heavy and creates a lot of server load.

Is this possible in any way with ES? If not, do you know of any good, light ways to do this for joomla?

Thanks