I'll post it again, a link to the relevant page in the manual:
http://manuals.ootpdevelopments.com/...e_page.options
Excerpt:
Simulate World in Background
The final option is called Simulate World in Background. This enables or disables real-time simulation. When this is enabled, you will be able to track the progress of other games running simultaneously on the BNN Network screen. If this option is disabled, only your game will be played out.