Out of Office question

Hi all

Just a Exchange 2010 out of office question

If we are 4 companies in the same forest with different domains and all their own Exchange 2010 infrastructure, can out of office replies be configured so that the 4 companies get OOO from each other but are NOT able to send OOO to the Internet? Or is OOO in Exch 2010 also a all or nothing setting ie. where the 4 companies can send to each other but it will go to the internet also

Exch2003 this cannot be done I assume as it is a global setting

Thanks in advance