a couple of options...
if you're using the conductor, then you can add a slave (gets put in another etherdongle)
(with this setup, you could have as many channels as you wish, just keep adding etherdongles + slave units over and over to reach whatever channel cout you want!)
in this setup, you would have to break your sequences apart in chunks of 16,384 channels to fit the format for the sequence going on the flash memory card.
(and for each slave)
if you're using a computer, you can use another etherdongle setup to use ip addresses other than what the original etherdongle uses. (there's test firmware floating around the forum somewhere that you could use to test, until RJ has a chance to write the final ones {unless RJ says otherwise})
you don't have to break apart your sequences, but i can see that at some point, then you'd have so much traffic on your network that you will find a limit.
(the first scenario would only use a "sync" signal between the conductor and slave. no sequence information would travel across your network as each slave would contain the sequences of it's own 16k channels)