Well, from what I found is that the FULL restore of the ENTIRE disk group is supported. We cannot restore a single Logical volume of the disk group.
So, if they needed to restore a single data file, we would have to "MOUNT" the snapshot of the Disk Group and then manually copy the datafiles needed back to the active file system. SMO might not be able to do this, but it can be done via scripts outside od SMO.
I know that snapdrive supportes the "snap connect" of an entire volume group.
Here is a "snipit" from the SDU manual (4.1.1):
"SnapDrive for UNIX integrates with the host LVM to determine which NetApp LUNs make up each disk group, host volume, and file system requested for Snapshot copy. Because the data from any specified host volume can be distributed across all disks in the disk group, Snapshot copies can be made and restored only for whole disk groups."