Right answer

Hi,

I suggest you to use ir.rule, record rules are conditions that records must satisfy for an operation (create, read, write or delete) to be allowed. 

See the example in the below code : 

<record id="salesperson_groups_rule" model="ir.rule">
  <field name="name">Sales person: Access own sales person only</field>
  <field name="model_id" ref="model_sale_person_code"/>
  <field name="domain_force">[('salesperson', '=', user.id)]
  </field>
</record>

Best regards!