Ok, this post is a bit confusing.
It appears you want share level or NTFS level permissions within the vfiler, b/c you keep mentioning share.
If you are looking for vfiler acccess for a vfiler administrators group it would be get-nadomainuser -g administrators
If you want share/ntfs permissions, you need to use Windows Powershell cmdlets with AD to pull them, like get-acl