You have licenses for several Autodesk products, and you want to combine the licenses into a single license file. For example, you have Maya 2010 and Softimage 2010 licenses, or you have Max 2009 and Softimage 7.5.
You can combine licenses for different products if the products use the same vendor daemon. For example, you can combine any 3ds Max license with a Maya 2010 license, because both products use the adskflex vendor daemon. You cannot combine Maya 2009 and Maya 2010 licenses, because they use different vendor daemons.