Can BetterTouchTool modify keystrokes in a single app?

Hi I love to play world of warcraft.
Anyways, in the game I want to use the Windows ALT key which is CMD for Mac. I use an external keyboard. Can I have the BetterTouchTool modify that singular key when I have the game open? I love to have my MacOs function like a windows computer. My work around is extremely uncomfortable as I have to swap CMD and Option key on my external keyboard.

Thank you.