Yup, you can certainly do that. I’ve seen people put one clamp on the washer and one on the dryer. If you opt for that setup, you will need a custom DTH to split and report out each clamp’s data because by default it reports data for the whole meter.
You can also still use the HEM with the stock ST DTH, but you’ll have to put each clamp around the hot and neutral wires of the power cord. I’ve seen people do that by purchasing a separate heavy load pigtail and separating those wires from each other. It will require one of those pigtails that are flat where you can carefully do this.
Lastly, you could clamp around the wires within your electrical panel. That’s another questionable option, but I still wouldn’t do that either unless I was absolutely sure of what I was doing.
I don’t believe you’ll be happy with the motion sensor on the dryer, but the plug on the washer will work very well.
You can do this without Webcore in either app. In the new app, set up an automation. In the Classic app, go to the Marketplace → SmartApps. Tap on Energy Management and then Energy Alerts.
New app example:
