From the VMware Fusion 6 EULA accessed by clicking License Agreement on the About VMware Fusion window.
VMWARE FUSION AND VMWARE FUSION PROFESSIONAL
You may install and use the Software for personal, non-commercial use on any Apple-branded products running Mac OS X (“Mac Computer”) that you own or control.
If you are a commercial enterprise or educational institution, you may install and use the Software on a number of Apple-branded products running Mac OS X (“Mac Computer”) that you own or control equal to the number of licenses purchased. Installing and using the Software on multiple Mac Computers with a single license is prohibited even if the computers are not running the Software concurrently.
I'd say that was self-explanatory! Image may be NSFW.
Clik here to view.