NFS automount group share

Altough I found some hints about automount of home directories, it’s not what I’m looking for. After kerberizing SSH my domain admins can log in and are in their homes automatically (mounted via NFSv4 from the file server). Now I thought it’s a good idea to have a group share also mounted maybe in the users home directory.
With a policy I can mount a NFS share statically as mentioned here, but I’d like to have it dynamically as an automount.
How to do that?