I have a template-fragment in /etc/e-smith/templates-custom/etc/rc.d/init.d/masq/47BlockSpecificIP
which I use to block a particularly annoying "client". A version for you could be:
# Block specific IPs
/sbin/iptables -I INPUT -s pornolize.com -j DROP
I expect you could try this if Nathans rule doesn't work for you. Always use template-fragments if at all possible. (If I understand the question correctly, it is access *from* pornolize,com which is the problem).
/Jens