eiru_sale_commission_cemobo/views/sale_order_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>

        <record id="view_sale_order_commission" model="ir.ui.view">
            <field name="name">view.sale.order.commission</field>
            <field name="model">sale.order</field>
            <field name="inherit_id" ref="sale.view_order_form" />
            <field name="priority" eval="18"/>
            <field name="groups_id" eval="[(4, ref('base.group_sale_salesman'))]"/>
            <field name="arch" type="xml">
                <field name="user_id" position="after">
                    <field name="commission_id"/>
                </field>
            </field>
        </record>

    </data>
</openerp>