Move pads separately in altium
If you mean you want to edit the footprint and make it so the diode must be bent to a larger pitch.. yes, it's possible. Simply double-click on the footprint and unlock primitives: 



I think you're better off to make different footprints and select the appropriate one for the job though. For example, you might make diode footprints with 10, 12, 14 mm pitch.