Many virtual competition organizers would like to only allow a specific set of participants to enter their challenges via Clippero.
Unfortunately, we do not support invite-only or restricted challenges at this time (hopefully in the future), so technically, when your challenge is set to Entries open, anyone can enter. However, we still have many organizers using Clippero for invite-only challenges, and the below sets out how to run them.
Recommendation #1 - Include "INVITE ONLY" in the challenge title
As per the example below, adding an "INVITE" copy into the challenge title will make it clear that this is not an open challenge and will discourage non eligible participants to enter.
Recommendation #2 - delete any ineligible entries as they come in
As a host, you have the authority to delete any ineligible entries as they come in. See here for more on deleting an entry.
Recommendation #3 - be sure to close entries once your invited participants have entered
You can close the challenge's entries via the challenge settings. See here for more.