Are you seeking to restrict the limit for all of your users, or are you just wanting to create invites that can only be redeemed by one person? If the latter, you can do this when creating your invitation. Select the “Edit link options” link, then change max users to “1”. You can also specify an email address if you want to make sure it’s only accepted by a specific person.
If the former, what is your use case for only wanting to let users invite one person at a time?