Hi, it’s not possible using security settings. Why do you need to do that?

Would be possible, with workarounds using page designer and different contexts, but I would not recommend it, because the administration effort will increase significantly.

Try add on the page, a duplicate of the field in a different context. Then hide/remove/readonly (make it not editable) the default field in the global context. It should not be a mandatory field, else only the guys who have access to it will be able to use the screen for data maintenance. 

Thank you for your quickly replies. You have validated that it isn’t possible to modify access by permission set.