The question was to give user rights to a particular note category.
You need to give that user the following rights.
https://jlssolutions.com/QA/3369/there-separately-granted-rights-category-within-financials?show=3580#a3580
- Account Grid / Edit - Notes
- !Members / Families - Notes Tab
- !Members / Accounts - Notes View All
- Notes Categories / View - YourCategory
- Notes Categories / Update/Delete - YourCategory