The current version of Bandwidth Manager does not display host names next to IP addresses. The main reasons for that were:
Not all devices have a host name, and thus retrieving it would require a separate task to reverse-resolve each IP address.
IP addresses are dynamic in their nature: a device with IP address X.X.X.X may map to one host name today, and a different device tomorrow. The correct mapping would require the process (1) to be repeated every N hours.
That said, it is a useful feature and we could implement it in the next release.