LDAP and Multiple Servers/Namespaces

Has anyone worked out a way to use LDAP to define the default namespace on multiple servers?  I know that documentation says that intersystems-Namespace-xxx only supports one namespace, but how is this useful?   Any workaround to say have  intersystems-Namespace-server1-namespaceA  and intersystems-Namespace-server2-namespaceB?  Is it best practice to use the same "namespace" on every server?

Thanks!