From Notezilla 9 onwards, we have added a feature to show notes by a particular memoboard/tag. You can keep your work sticky notes in a separate memoboard and home sticky notes in a separate memoboard. Or assign respective tags to those sticky notes.
Once this is done, right click on Notezilla icon and choose Desktop notes/Show notes by/Memoboard or Tag from the menu.
Here is a screenshot: