Scheduling tasks via schtasks

Im trying to deploy some system maintenance sheduled tasks on our office network via schtasks using batch files. There is one thing we want run when the computer is idle, which ive set up. The GUI interface has an option to
"stop the task if the computer ceases to be idle"
but i cant find a way to set this via switch on the command line. Right now, the program will run, but wont end for a set ammount of time. I want the program to end when the user gets back on the computer.