You can disable Notify for specific networks, as an implied feature of setting specific networks on all of your Notify entries.
That is, if you want to turn off Notify for EFNet and Freenode, make sure all your Notify entries specify Dalnet, Undernet, and QuakeNet. Though, perhaps it's not possible to specify multiple networks per entry.
I would like to see comma delimited lists in Notify fields, too.
