I have a Sonicwall TZ100W that I am using to share an Internet with another office. The ISP provides quasi static IP addresses(technically long lease DHCP addresses), so I have had to use two ports to get two WAN IP addresses, as both I and they have Small Business Servers. I have been able to get the inbound services working, so my email comes to me and thiers to them, but to be able to do this I had to enable load balancing. This means that both internal networks are sharing both external interfaces, but I would like to limit my computers to use one of the external IP addresses and the other network to use the other external IP address. Is this possible?