From what I've seen of them, no - they effectively turn the single loop between switch and powered device into two distinct things, the switch(es), and a relay

From what I've seen of them, no - they effectively turn the single loop between switch and powered device into two distinct things, the switch(es), and a relay that can turn the device on and off. Even if they could be it would involve opening up the switch/socket box and removing it to get at the actual device, which you'd presumably want to kill the entire circuit for anyway.