My bandwidthd monitors the WHOLE subnet now. I don't want that. Is it posible to let bandwidthd monitor only 2 ip's? I don't want that I (and others) can see the bandwidth information about other ip's in the subnet.
Look in bandwidthd.conf, and add a line for each subnet you wish to monitor. For two IPs, make it a /32, so something like:
should do what you want.