Hello,
I saw an interesting feature once.
The thing was to make the virtualization program and the VM match with each other.
If I remember well it enabled the admin to allow the use of only specific vm with the virtualization program as well as prevented the user from going away with the VM and using it elsewhere.
I think it was with VMWare Ace (that is discontinued as of 12/31)
Of course the question is, do you see a mean to do the same thing with VirtualBox ?
Thanks in advance.