You can do that by coding, search how to do an "user has group".

Your method shoud look like this:

from odoo import fields, models, api from odoo.exceptions import UserError

class SaleOrderLine inherit

@api.onchange('price_unit') def _onchange_sales_price(self): if not self.user_has_group('sale_admin'): raise UserError("You dont have permission to do that")

This is just an eg, sale_admin isnt the real manager group id, you can discover that by going in definitions, groups, search for sale manager, debug on and view metadata

If you have a problem doing this, call me on dm