That's not something we'd implement in JFBConnect. Since you're basically just looking to redirect users that are logged into your site (whether through Facebook/JFBConnect or Joomla) to a new page, it's really not a JFBConnect-specific issue.
I'm not sure if there are plugins out there that do this already. If not, the only code you'd need is:
if (!JFactory::getUser->guest)
JFactory::getApplication->redirect('index.php?option=.....');You could use a custom PHP module for that, like
Flexi Custom Code
Hope that helps,
Alex