Lite-C tutorials are not available, but for C-Script there are.
Before doing multiplayer you need to know Lite-C and/or C-Script anyway, so if you understand how to program multiplayer in C-Script, you can do it in Lite-C as well. The system is pretty similar - Lite-c just offers further useful possibilities.
As for tutorials check free Multiplayer games in the Contributions/Showcase1 forums or check Acknex Unlimited (Link on bottom of page: "resources")