Hello,

With record rules, I would define a "read access" rule for the lower user group that only allows them to see a certain category of product.

Hope it helps,

Hi, 

Try adding a many2many field in res.users like below,

allowed_product_ids = fields.Many2many("product.template", string="Allowed Products")

Then add this below record rule to product.template model,

<odoo>

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

        <field name="name">Allowed Products</field>

        <field ref="product.model_product_template" name="model_id"/>

        <field name="domain_force">[('id', 'in', user.allowed_product_ids)]</field>

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

        <field name="perm_read" eval="True"/>

        <field name="perm_write" eval="True"/>

        <field name="perm_create" eval="True"/>

        <field name="perm_unlink" eval="True"/>

        <field name="active" eval="True"/>

    </record>

</odoo>

Regards