Now OpenERP only propose 'debit' payment modes on Direct Debits and 'payment' payment modes on Payment Orders.

account_banking_payment/model/__init__.py

@@ -1,7 +1,7 @@
 import account_payment
 import payment_line
-import payment_mode
 import payment_mode_type
+import payment_mode
 import payment_order_create
 import banking_import_transaction
 import banking_transaction_wizard

account_banking_payment/model/payment_mode.py

@@ -50,4 +50,8 @@ class payment_mode(orm.Model):
             help=('Limit selected invoices to invoices with these payment '
                   'terms')
             ),
+        'payment_order_type': fields.related(
+            'type', 'payment_order_type', readonly=True, type='selection',
+            selection=[('payment', 'Payment'), ('debit', 'Direct debit')],
+            string="Payment Order Type"),
         }

account_banking_payment/view/payment_mode.xml

@@ -11,6 +11,7 @@
             <field name="inherit_id" ref="account_banking_payment_export.view_payment_mode_form_inherit"/>
             <field name="arch" type="xml">
                 <field name="type" position="after">
+                    <field name="payment_order_type"/>
                     <group colspan="4" col="4">
                         <group colspan="2">
                             <separator colspan="2"

account_direct_debit/view/account_payment.xml

@@ -46,6 +46,9 @@
                                 icon="gtk-find"
                                 />
                     </xpath>
+                    <field name="mode" position="attributes">
+                        <attribute name="domain">[('payment_order_type', '=', payment_order_type)]</attribute>
+                    </field>
                 </data>
             </field>
         </record>