Mac OS X Snow Leopard would allow you to assign applications to a particular space using a control panel in System Preferences. This is no longer the case with Mac OS X Lion which offers a completely different option for assigning applications to spaces.
Assign Applications To Mission Control Spaces In Lion [OS X Tips]
![Assign Applications To Mission Control Spaces In Lion [OS X Tips] LionDesktop4](https://cdn.cultofmac.com/wp-content/uploads/2011/08/LionDesktop4.jpg)