The "AFS distributed filesystem FAQ", posted in
It is possible to have both users and IP addresses as members
of an AFS group. By using an IP address like this you can specify
all the users from the host with that IP address.
I'll let you know just as soon as I get this to work. This is the
response that I've gotten from accounts so far...
Unfortunately, we are not able to process your request since this is not
supported. If you have any questions, please don't hesitate to contact us.
I will keep working on it.