The 'others' are aliases of the loopback interface lo, where alias means 'other name for same thing'. In this case the same thing is the interface lo. So what you do is capture on lo and see the traffic for the aliases (127.0.0.2 ...) as well as the main address (127.0.0.1). It will all be on the same device, and that is what you capture on, not on an address.