Yes, i'm using it for twitch bot.
I followed the instructions from your tutorial and in Networks field i have only all networks and when im clicking add theres no twitch.
That tutorial assumes you have added the twitch server to your servers list. If you haven't you can add it via the servers list under Connect > Servers > Add.
Alternately if this bot is only going to ever be connected to twitch feel free to just use the "All Servers" option and instead of clicking add just type the command into the text box below (be sure perform on connect is ticked in the checkbox above still).