Hiding vCard Info from Domain and Public Directories

[Geminiguy]

I know that each Groove client can hide their identity information
from Public and Domain directories.

However, has anyone found a method (**from the Groove 2007 Servers**)
to administratively force for a group of accounts:

a) Groove account identit(ies) from being seen in either in the
public *and* domain directories at the same time;
b) prevent account domain and group labels from displaying in Groove
clients once an identity is accepted into a workspace or the contacts
listings once an account / identity has been added?

Thanks,
Gguy