SDLNet binding multiple channels to one UDP socket?

Hey guys.

I just don’t get it! Is it possible, to assign more than one channel to a
single UDP socket?
Because when I do so and try to receive packets on that socket afterwards, I
only receive packets from IP addresses of the channel that was assigned
So it seems that only one channel can be bound to a socket at a time. But if
so, what is SDLNET_MAX_UDPCHANNELS good for, anyway?

Do I have to create a new UDP socket, if I want to use channels and want to
handle more that 4 (SDLNET_MAX_UDPADDRESSES) clients at the same time?