Possible to have a welcome message based upon channel?
No, please use the channel description if you have something to say about that channel.
There's a way to get a message for everyone who joines the channel.
Choose function "channel notify" and pick a ServerGroup where no one is in. Then enter your message in both of the spaces provided for the channel.
For the message for people which are in this servergroup (you could name it "spacer") enter: "You're not allowed to be in ServerGroup "spacer". Please contact an admin(istrator). This message will appear very often.
I've worked with this method for a musicbot channel for example. :)
LG
Lorixon
Thanks Lorixon, of course this is a working workaround.