If you want it because you want to direct connect with someone then it should show just above the direct connect search box. If it's not there it means you're firewalled & direct connect probably wouldn't work. To configure your firewall so it allows LW full access (advisable not to have 2 active firewalls b/c they can interfere with each other); config instructions: Firewall configuration instructions

You can find more about direct connect from a link in this thread: How to use Bitzi Web Lookup ... & How to use Magnet Links & Direct Connect

To find your ip by yourself, go here: http://www.whatismyip.com/