Why would you want to run both clonezilla and FOG? FOG uses partclone which is the same program clonezilla uses. That said, it’s one thing if you wanted to use a CloneZilla Image on a host. We do have support for that, by simple creating the Image definition and setting the Image Manager to Uncompressed. FOG, however, has many more options readily available and configurable via the GUI. Again, this is not to say you cannot use Clonezilla images with FOG. However, FOG manages hosts, inventory, images, and much more through a simple web gui. Running clonezilla is possible, but still means you have the manual tasks to complete.
I guess we need to understand the why of this more so we can try to help you out more.
@Tom-Elliott Thank you for the response. So it seems the two issues are not linked. The duplicate MAC address issue is related to this: https://forums.fogproject.org/topic/13402/fog-1-5-6-changing-host-mac-address-can-make-hosts-inaccessable/6. The primary MAC address being added as an additional MAC address is in fact a feature.