1. Set up a relay with a server for concerts
2. Stream spontaneously from my machine for a close friend

I have audion, so I need to figure out how to set the ip address for the relay server, And how would I set the ip address so it streams from my machine?
Any direction or help would be greaty appreciated.
On my G5 2.0mac (not intel) I have the motu 828mkII as my interface, Logic, Pro Tools etc. I have a comcast cable modem with upgraded bandwidth.
Thank you,
Geb