nm-applet / Gnome Network Manager: How to stop it from connecting to networks I don't want

[Chanchao]

Hi,

Can anyone explain what the relation is between nm-applet (Gnome Network
Manager) and "Network Monitor" ?  Both are panel applets and they seem
to overlap and interfere with each other.

nm-applet does a GREAT job connecting to wireless networks.  In fact it
works TOO good.. it also connects to any random wireless access point
that's unencrypted, and then configures DNS for me, taking it away from
my regular office fixed LAN network.   I don't want it to do that!

I only want it to connect to my home wifi network when I'm at home, and
leave me alone when I'm at the office and using the regular LAN.

I did not see any settings window or other configuration screen.. How to
solve this?

Cheers,
Chanchao