I think I've seen reports of some folks with it working, but there are some critical problems with passthrough of HBAs, so it would clearly not be for serious storage if the disks can't be directly accessed by the guest.
Feel free to try. Be careful with your data.
EDIT. Ignore that answer, didn't see the thread was for Truecommand and not FreeNAS.
VMware = the most supported virtualization platform.
Virtualbox = Oracle (the owner of ZFS and Virtualbox, the previously included hypervisor for FreeNAS in version 9) if you can run it in Virtualbox, you should be able to dd the raw HD file across and run on bhyve.