Apper has an option in it's settings regarding when to automatically download
and install updates.  Under this setting there's an option "unless I am on a
mobile data connection", which supposedly ensures that Apper doesn't download
software updates while connected to a mobile (or metered) network.

Unfortunately there doesn't appear to be any way in NetworkManager to designate
a wireless or wired connection as being a mobile connection, i.e. a connection
provided by a wireless hotspot or USB tethered phone.

I'd really like to set Apper to automatically download and install updates as
soon as they are available (I'm running on openSUSE Tumbleweed, which I believe
is just Factory now?), but I can't do this because I occasionally have my
laptop connected to my 4G hotspot, and I don't want to risk having packages
download over 4G.