Yes, all participations of contests created with Premium and White Label versions can be moderated, including those that come from integrations with Twitter and Instagram.
If you want validate and authorize the participations before publishing them in the gallery, you must activate this option from promotions "Editor".
Locate the "Settings" section, and on "Entries" you will see the option "Confirm each entry before publication". Enable this option and save the changes before leaving the Editor.
Note: Also in this section you will find "notification of new entrant" option. Complete this field with your email address if you want to receive a notification in your Email inbox every time a new participant completes the registry form. This option is not available for users that have participated via Twitter or Intagram with a hashtag.
Pending entries can be moderated from the “View entries” section of the promotion administration page. In addition to having the option to accept them, the administrator can also delete, reject or edit them – for example, if a photo has been uploaded upside down it can be rotated.
In order to manage the pending entries click on "Review" or use the "Pending" filter.
Below is an example of a pending participation. Click on "Accept" if the participation is valid and you want to publish it in the gallery, or "Reject" if you don't want to publish it.
Note: You can create confirmation emails to send to participants when their entries have been accepted and published. Also, you can create emails to inform those participants whose entries have been rejected.
You will always, afterwards, unpublish any entry you have accepted. Search the entry using the "Accepted" filter or searching by name, last entries, etc. Once you have located it, click on "Reject" if you want to unpublish it as you do not want this entry to be visible on the public gallery.