Humm, not sure what you're getting at, if you wish "to join my [VMware Workstation] host PC to the domain" then just do so as you would do normally . . . however, if you mean that you wish the [VMware Workstation] Host to connect to the Domain based on the VMs than depending upon the virtual network configuration (NAT, Bridged, Host, Custom) will depend on how you might be able join the domain.
It you wish to virtualize the [VMware Workstation] Host PC and put that into a VM then you would normally perform a Physical-to-Virtual (P2V) conversion. However, this sounds like an oxymoron, because you would be virtualizing the very thing that was running your VMs !
P2V Background (Current Information)
If you search on this forum, you will find many posts relating to this topic, but the following may assist:
VMware:
vCenter Converter Unavailable for Download
New vCenter Converter Beta
Never used this software so can't comment:
V2V Converter/P2V Migrator
