Currently we can only do auto pause in either all games or no games. I wish online games will not be auto paused since it usually means loss of connection to the server and that's not very far from exiting the game.
As for the way to detect whether a game is an online game, we can probably choose one of the following
Check Steam Store labels, online games will have "Online Co-op" or "Online PvP", the drawback is that the game will not be paused even if it's running in offline mode.
Check if the game's process is listening on any port or something similar, I'm not sure if that could be reliable or not.
Allow users to choose which game to have auto pause, this might be the best solution to have as a third party plugin.
Currently we can only do auto pause in either all games or no games. I wish online games will not be auto paused since it usually means loss of connection to the server and that's not very far from exiting the game.
As for the way to detect whether a game is an online game, we can probably choose one of the following