Hmmm, that depends on the virtualisation solution being used.
If someone's using (say) VMware Workstation or Fusion, if they've loaded the VMware tools into the VM it can share the clipboard and be configured with access to the hosts filesystem (at defined points).
If someone's using (say) VMware Workstation or Fusion, if they've loaded the VMware tools into the VM it can share the clipboard and be configured with access to the hosts filesystem (at defined points).