Local group and ldap user combination

Hi Admittedly this is slightly OT but I were hoping someone could point me in the right direction.

I want to be able to grant LDAP users group membership to local groups on a Ubuntu box. For example the adm group.

How would I go about doing this?

As a very quick test I created a adm group in ldap but it is not having the desired effect. Output from getent group | grep arm

adm:x:4: adm:*:4:uid=ggeldenhuis,ou=People,dc=example,dc=com

The first adm group is the local file group and the second my ldap group.

Am I going about this in the wrong way... ?

Regards