So my niece is on a separate network to have more control over him (e.g. not allowing him to watch Netflix until 3AM). This situation is a race by nature over loopholes, and of course with him on winning side. I think he got somehow the password to the proper network.
The question in short: is there a way to see which network did a particular client connect?
(Or is there any better way than MAC filtering to prevent connection to a given network?)