Separate Zend Application for control panel?

[Eagenuare]

Shall I create a seperate Zend Application for the user backend of a web application?My main concern is that I have to have a seperate Zend_Auth on both the public website (for clients to login) and for the user backend (for employees to manage the site).Since it appears to me that I can't use multiple Zend_Auth instances in one application this would be the only solution.The next concern would be that the two Zend_Auth sessions will collide since they run on the same webspace?Cheers