Exception for specific SEP clients in a particular group

Hi,

We have SEP 12.1.6 MP5 running in our environment with 4000+ clients. There are many groups in SEPM containing clients according to the cities e.g.Chicago, Houston, San Jose etc. In one of group (Boston) where we have 400+ clients, our development team members (20 to 30 clients) are also inside it. SONAR is giving them problem as it is blocking legitimate applications that they are working on. We need to disable SONAR for only developemnt team members while other user in Boston group should have it enabled. How can we achieve this?