flectra/addons/base_branch_company/security/branch_security.xml

<?xml version="1.0" encoding="utf-8"?>
<flectra>
    <record id="branch_comp_rule" model="ir.rule">
        <field name="name">Branch</field>
        <field name="model_id" ref="model_res_branch"/>
        <field name="global" eval="True"/>
        <field name="domain_force">['|',('company_id','=',False),('company_id','child_of',[user.company_id.id])]</field>
    </record>

    <record id="ir_rule_branch_allowed"
            model="ir.rule">
        <field name="model_id" ref="model_res_branch"/>
        <field name="domain_force">['|',  ('id','=',user.default_branch_id.id), ('id','in',[g.id for g in user.branch_ids])]
</field>
        <field name="name">Allowed Branch</field>
        <field name="global" eval="True"/>
    </record>

    <record model="res.groups" id="group_multi_branch">
        <field name="name">Multi Branch</field>
        <field name="category_id" ref="base.module_category_usability"/>
    </record>
</flectra>