A Linux Users Group can take any form, but the accepted "standard" seems to be a MeatSpace meeting every now and then, and a MailingList.
NorthLUG - Northland
PalmyLUG -- Palmerston North
KLUG -- Kapiti, currently appears inactive
WellyLUG -- Wellington
CLUG)We are one of four places we know of that maintain a list of LUGs in New Zealand; the other three are
New Zealand page
New Zealand Linux Mailing Lists
User Groups in NZ
New Zealand FreeBSD Users Group
Interface.org.nz -- Victoria University of Wellington Computer ClubSee GLUE.