I have  written the general codes as below:

 <record id="some_task_user_rule" model="ir.rule">

<field name="name">Some Tasks only for owner</field>

<field name="model_id" ref="model_some_task"/>

<field name="groups" eval="[(4, ref('base.group_user'))]"/>

<field name="domain_force">

.....

</field>

</record>

I don;t know how to write the "domain_force"; could you give me some advice?