[libvirt] KVM netowrk setting

HI All I have KVM virtual machine running under bridging.I don't want to use bridging/Nating.I want to use routing via IPTABLES to route traffic toward the virtual machine is that possible.These thing benifit me in flitering .And i have live ip on virtual machine.Please let me how i can achive this. _________________________________________________________________ Windows Live™ Groups: Create an online spot for your favorite groups to meet. http://windowslive.com/online/groups?ocid=TXT_TAGLM_WL_groups_032009