Currently Being ModeratedDec 4, 2012 8:25 AM (in response to kaykre)
There is an app called "Airport Utility" in the App Store that allows you to manage the network. you have to have an Apple router or Apple Airport to manage the network. I don't think it monitors it though. From what you're saying, you want to monitor traffic. Airport Utility can let you know how many devices are on your network and how fast the network speed is for each device.