Setting up multiple domains for an user by using LDAP based RBM

Hi,
I am trying to setup the domains and users for the Datapower device X150. We are using LDAP based RBM and xmlfile as the authentication. I tried the following and it did not work:

<aaa:MapCredentials>   <aaa:InputCredential>uid=user1,ou=DP,DC=DP,DC=ORG</aaa:InputCredential>
   <aaa:OutputCredential>developers</aaa:OutputCredential>
</aaa:MapCredentials>

<aaa:MapCredentials>
   <aaa:InputCredential>dpdevelopers</aaa:InputCredential>
   <aaa:OutputCredential>*/Dev1/*?Access=r+w+a+d+x </aaa:OutputCredential>
   <aaa:OutputCredential>*/Dev2/*?Access=r+w+a+d+x </aaa:OutputCredential>
</aaa:MapCredentials>

I also tried the following and it did not work

<aaa:MapCredentials>   <aaa:InputCredential>uid=user1,ou=DP,DC=DP,DC=ORG</aaa:InputCredential>
   <aaa:OutputCredential>dpdevelopers1</aaa:OutputCredential>
</aaa:MapCredentials>
<aaa:MapCredentials>   <aaa:InputCredential>uid=user1,ou=DP,DC=DP,DC=ORG</aaa:InputCredential>
   <aaa:OutputCredential>dpdevelopers2</aaa:OutputCredential>
</aaa:MapCredentials>

<aaa:MapCredentials>
   <aaa:InputCredential>dpdevelopers1</aaa:InputCredential>
   <aaa:OutputCredential>*/Dev1/*?Access=r+w+a+d+x </aaa:OutputCredential>
</aaa:MapCredentials>

<aaa:MapCredentials>
   <aaa:InputCredential>dpdevelopers2</aaa:InputCredential>
   <aaa:OutputCredential>*/Dev2/*?Access=r+w+a+d+x </aaa:OutputCredential>
</aaa:MapCredentials>

We need to have same developer accessing multiple domains. How do I do that?
Any help greatly appreciated...

Thanks in advance,
Suresh