I'm wondering if there is a way to keep track of who the last person who has opened a word document is?

Hi
You can view a document property which would display "Last Modified By" but there is no property for "Last Opened By".
If someone opened a document and then closed it without saving Word will not store that users name. If someone opened the document and then saved it without making any changes then Word would store that users name.
Hope this helps.
Tony