auth_supplier/security/auth_supplier_security.xml
<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>
<record model="ir.module.category" id="module_auth_supplier">
<field name="name">Auth Supplier</field>
<field name="sequence">100</field>
</record>
<record id="group_auth_supplier" model="res.groups">
<field name="name">Portal Supplier</field>
<field name="category_id" ref="module_auth_supplier"/>
</record>
</data>
</openerp>