There is not currently an out-of-the box way to say the invited users for the community. However if you have access to the database, the details will be provided in jiveinvite table. This will provide you the inviterID, as well as the email, sent date, and the state of the invitation.
Additionally you might consider creating an idea for the feature for a future release. Feel free to create an idea for the request here Ideas for Jive, this will allow it to receive votes and help gain visibility with our Products team. In order to receive access to the Ideas space, please add your name here Are you a customer? Request customer-only access today
Hope this helps.
Thanks John! I'll take a look at the table and will add an idea. We are fairly new, launched our external community back in April/May. Thank you for your help!