how to restrict who_access

[kam <kam @ york . cuny . edu>]

Dear Majordomo admins:

Excuse me if this is  a trivial  question.
Could anyone tell me how do I restrcit the  who_access to only a few
addresses --
not to the whole list. In other words, I dont want  any of the three
values suggested
in the list.config file, ie, open, list, closed. Is there any way to
give access only a few-
apart from the list?

Thanks in advance for your suggestion.

Kamrul

PS: please cc a response to kamrul@york.cuny.edu