SuSEfirewall2 restrict access to specific networks to hosts?

I have a SuSE 9.3 machine using SuSEfirewall2 (as configured via YAST) to open a few ports for services such as sshd and cups. However I want to restrict which hosts and/or networks can connect. For this purpose I have used hosts.allow/deny for ssh and /etc/cups/cupsd.conf for cups. But is possible to add an ACL via SuSEfirewall2? Regards -- Simon Oliver