Currently, we're supporting multiple stores configuration. But they can not mix/support different identity types. They must support all identity types and another relationship types, for example. The scenario above is being tested in our suite.

We also need to consider multiple store configurations with different identity types, as follows:

builder
    .named("default")
        .stores()
            .jpa()
                .supportType(Role.class, Partition.class)           
            .ldap()
                .supportType(LdapUser.class, Group.class)

The example above, allows to store the LdapUser and Group identity types using the LDAP store and JPA for Role.