Pruning Servers by Game Played

I'm running a server that was made for a certain game, but as time goes on some people stop playing that game and move on to others. Having an option to prune by game, even if the user has been online doing other things, would be very helpful for those who run servers with dedicated games. It would work in a similar way, being able to measure which people have not played a certain game within 1 day, 1 week, 1 month, etc.