What do you mean exactly? Do you mean that if you type "http://<ipaddr>:8080/...", where <ipaddr> is the IP address of your machine on your network, it doesn't work? Are you trying to access it from the same machine or from a different machine?
Maybe this is because you have a firewall switched on. Are you using Windows? Try going to Start / Control Panel / Security / Windows Firewall then go to the Exceptions tabsheet and add the port that Tomcat uses as an exception, so that Windows Firewall doesn't block communication.