eiru_pos/security/eiru_pos_security.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data noupdate="0">
        <record id="eiru_pos_category" model="ir.module.category">
            <field name="name">Eiru POS</field>
            <field name="description">Eiru POS Access Level</field>
            <field name="sequence">200</field>
        </record>
        <record id="group_eiru_pos_user" model="res.groups">
            <field name="name">Usuario</field>
            <field name="category_id" ref="eiru_pos_category"/>
        </record>
        <record id="group_eiru_pos_manager" model="res.groups">
            <field name="name">Gerente</field>
            <field name="category_id" ref="eiru_pos_category"/>
            <field name="implied_ids" eval="[(4, ref('group_eiru_pos_user'))]"/>
            <field name="users" eval="[(4, ref('base.user_root'))]"/>
        </record>
    </data>
</openerp>