Hi,

You can hide rows of a tree by adding a domain on the ir.actions.act_window

<record model="ir.actions.act_window" id="id_name">

      <field name="name">name</field>

      <field name="res_model">res.model</field>

      <field name="domain">[('state', '=', 'cancel')]</field>

      <field name="view_mode">tree,form</field>

</record>

Regards