Quit torrenting when away from home

my-launch-agent.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC -//Apple Computer//DTD PLIST 1.0//EN
http://www.apple.com/DTDs/PropertyList-1.0.dtd >
<plist version="1.0">
<dict>
<key>Label</key>
<string>some-unique-label</string>
<key>ProgramArguments</key>
<array>
	<string>osascript</string>
	<string>path/to/quitTransmissionIfAwayFromHome.scpt</string>
</array>
<key>KeepAlive</key>
<true/>
</dict>
</plist>

quitTransmissionIfAwayFromHome.scpt

repeat -- loop forever, polling wifi connection
	delay 20
	
	
	set currentSSID to do shell script "/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport --getinfo | grep ' SSID: ' | cut -c 18-"
	
	if currentSSID is not "TheseAintTheSameKind" then
		tell application "Transmission" to quit
	end if
end repeat

1. Edit the .scpt file to use your own WIFI name, and place it in ~/Library/Scripts/ folder.
2. In the .plist file, change /path/to/quitTransmissionIfAwayFromHome.scpt to the location of where you put the .scpt file
3. Place the .plist in ~/Library/LaunchAgents
4. Run launchctl load </path/to/plist> or just restart your computer.