Western Digital-My Book 1TB External USB 2.0 Portable Hard Drive for Mac

I just purchased the Western Digital-My Book 1TB External USB 2.0 Portable Hard Drive for Mac. I have four Mac including an  MacBook Pro, an iMac, and two Mac Books. Can I partition this drive so that it can backup all four Macs? Can I still use the WD Smartware. Or is this external HD limited to backing up one Mac?

Thanks

Can I partition this drive so that it can backup all four Macs? 

Did you mean 1 partition to backup ALL-4-MACs, or you mean 4 different partitions MY-BOOK 1 TB to backup 4 different MACS?

To my understanding WDSmartWare will allow you to backup ALL-4-MACs in 1 partition for MY-BOOK 1TB, and WDSmartWare will identify each MAC name under each folder after backup.

Thanks for your help. Greatly appreciated.