You can setup a Round Robin in Kallzu for this (see support videos inside the Kallzu platform). We don't teach setting up 5 numbers at first for local clients. When we go into an area with adwords or any other traffic source driving calls, we do a Round Robin and find the one, sometimes two clients keep in that area. So in that case, you would duplicate your campaign. That duplication process is par t of a training series that is being release in the coming weeks (Battle of Ft. Lauderdale).