I use Kasa Intergration app. I want to install the app twice, so i can login with a different account and use those plugs whitout google home allowing to control them.
If you now say 'turn everything off' that's what it does. Including the power monitor fridge, freezer, server,...
to avoid that i made a second account. There i can leave all my 'don't turn them off' plugs.
but how do I add a second account to hubitat?
Or
How to hide a few devices on google home so the kids don't turn off the server, even a second is 'bad'.
Settings are stored within the app installation instance. You should be able to install the app twice with different account details in each app installation.
It sounds like you are possibly integrating these devices with Google directly, instead of via Hubitat. One option would be to remove their direct integration with Google, and instead only share the devices you want Google to have access to by using Hubitat's Google Home integration. Hubitat allows you to select individual devices to be 'seen' by Google. This way, all of your Kasa devices could be used on a single Kasa account.