Per User Blacklist and white lists

[Mike Williams]

Is it possible to have a per user blacklist and whitelist?  Example in the
whitelist file:

To:     user-1 at domain.com  /etc/MailScanner/rules/whitelist/user-1-domain.com
To:     user-2 at domain.com  /etc/MailScanner/rules/whitelist/user-2-domain.com
FromTo: Default no


user-1-domain.com

From: friend at domain.com yes
From: friend1 at domain.com yes
From: default no

and so on?

Mike