You can't make servers for Toribash (LAN or otherwise) in version 3.1. There might be a release of a ToriLauncher application that allows you to do so in the future, though.
"Call yourself alive? I promise you you'll be deafened by dust falling on the furniture,
you'll feel your eyebrows turning to two gashes, and your shoulder blades will ache for want of wings."
The application ToriLauncher wasn't the only way to create the server back in the day. You could edit the file tbserver.exe (i think thats what its called) with certain settings in this format -p -blah blah something like that. You wouldn't edit the file, but the shortcut you created.