Not only can you follow tribes and keywords, but you can also follow individuals.
When you follow another member on Triberr their posts will show up in your stream for approval, and you also have the option of setting them to auto-share.
To get started, go to the members profile page that you would like to follow.
Next to their profile photo, click the gray "Follow" button
The follow button will turn green, and you'll have the option of auto-sharing their posts.
Auto-sharing means that as soon as one of their posts is imported it will automatically be scheduled to share to your attached social media profiles.