Currently it is not possible to restrict Notezilla sticky notes to a single desktop. You can instead hide the sticky notes instantly using the hotkeys, if this is convenient to you.
You can set hotkeys to hide all sticky notes and show all sticky notes. You can set these hotkeys using the Hotkeys Tab of Notezilla Preferences. To access Notezilla 's Preferences, right click on Notezilla icon and choose Preferences from the menu.
Note: The option "Hide notes on Show Desktop (Win+D)", if disabled, sticky notes will remain visible on desktop when using "Show Desktop" (Win+D) feature.
Once you do that, you can hide all sticky notes by default. When ever you need them, you can press the hotkey to show all sticky notes (less effort than switching to another desktop and switching back I guess).
You can also manually hide your desktop sticky notes.
Watch this short video to find out how: