There is, just keep experimenting with the variables and commands available in the mod, as well as some of the info on the threads about the mod. I did it once, though I can't actually remember how I did it... I think you need to go into the events section of the mod, it'll be called something like 'onPlayerJoin' And when you click it it'll give you the variable you need to, so what you type is something like /say Welcome [variablehere], except I don't recall how the variables worked.
Sorry, it's been so long since I've used that mod, and trust me, it just ends up becoming a hassle.
