Per domain black and whitelist

==== Required information ====
- iRedMail version: 0.8.3
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version:  CentOS 6.3
- Related log if you're reporting an issue:
====

Is it possible to setup a black or whitelist per domain instead of per user?

Regards,

Ari