hello,
You can not prevent the clients see "Other Network"
if broadcast from SSID is disabled, the AP sends the beacon hidden and
the clients see a network bat not known.
in the case can only enter the SSID (WLAN Network) manually.
I would suggest an installation point. one AP broadcast the SSID and the clients see the WLAN as available.
when You have more then one SSID You mast use the BSSID and guest mode.
miro