How to stop USMT 4 to migrate local group membership?

Hi there!

We are using USMT 4.0 to migrate from XP to Win7 (64bit).

USMT is be default migrating local group membership. So if the user to be migrated was member of the local Administrators group, it will be member of the local Administrators group on the destination machine, too.

And that happens even though we are changing the user's domain and name during migration.

How can we stop the migration of local group memberships?

I tried the following section in config.xml, but that doesn't have the expected effect.
But I might just do something stupid, as that <ProfileControl> component is hardly described in MSDN.

  <ProfileControl>
          <localGroups>
            <mappings>
                <exclude>
                  <pattern>*</pattern>
                </exclude>
            </mappings>
          </localGroups>
  </ProfileControl>

Does anybody have any ideas how to deal with it?

Thanks,

Christian