Need help in blocking personal printer not Managed printer

you could do something like

Files and Processes policy

Execute Command

when you know the name of the queue

Create

a successful way could be to lock the "printers" icon in the system settings. If you are enrolling the company (managed) printer(s) with jamf®  , there should not ne any need to open this point to the users. We are deploy our managed printers with jamf® . There printers are deployed with all the necessary configurations and if the user would have to change them, this could be done at the printer dialog.

You can do this at "computers | configuration profiles | restrictions" and there you can lock any system settings icon, for example "Printers & Scanners"

not working we will be getting the option to add print at the time or print page.