Maybe, maybe not. Just jack the car up under the shock, use about three long cable ties hooked together to hold the shock compressed, and then jack the car up letting the suspension hang. Take the holding bolts out and remove the shock.

The hard way (and I've done it both ways, thank you!) is just to jack the car up and let the suspension hang, remove the holding bolts, and then compress the nivomat by hand, hold it together and remove it before it expands. You don't need to disconnect the trailing arm (I did it once out of frustration but it wasn't necessary the next time) although that's one way.