This solution (Export Address Book Group Members to CSV) cannot be used for personal contacts.
However, you can use GroupWise itself for this task. From your GroupWise Address Book, select the folder you wish to export, then right-click with the mouse for a context menu and select Export Book. From the Address Book Export dialog, set Save as type to ‘Novell Address Book.’ If you choose to save as .NAB, you will obtain a file in CSV format. (You may change the filename to a .CSV extension.)