Are you interested in our Early Access Program (EAP)? This program allows you to preview code, test in your lab and provide feedback prior to General Availability (GA) release of all Infoblox products. If so, please click the link here.
You have to include each individual IP address you want to exclude. You can see an example with a couple IP addresses in the exluide list up above (second grey block from the bottom of MRichard's post).