Windows – Any ideas on how to emulate eight network adapters using a single physical adapter

I have an interesting setup that is moving from a legacy design to a newer design. The legacy design had eight physical, fiber optic media network adapters. The newer design utilizes a 10gb, copper media network adapter attached to a copper-to-fiber optic 8 port switch. Note, I am not seeking a virtual machine solution. This should be done on the actual host itself.

So, the legacy host has:

• Fiber optic adapter 1
• Fiber optic adapter 2
• Fiber optic adapter 3
• Fiber optic adapter 4
• Fiber optic adapter 5
• Fiber optic adapter 6
• Fiber optic adapter 7
• Fiber optic adapter 8

The new host has:

• 10gb copper adapter 1
• 10gb copper to 8 fiber optic switch

There is a software component to this system that expects there to be eight network adapters on the system. These adapters are supposed to connect to 8 network adapters on another system. Modification of the software component is not an option.

What I have tried:

I have tried assigning multiple IP addresses to the single adapter (which Windows 10 supports). However, the software enumerates the physical adapter, queries for the default IP address, and moves forward with that information. Thus, even though there are multiple IP addresses, the software component ignores the other IP addresses the adapter has bound itself to.

What I am seeking:

Is there a virtual or emulated network driver that allows extending the single physical adapter to multiple adapters routed through that single physical adapter? I have verified that using a virtual network adapter driver (like TAP or VirtualBox's network adapters) is detected by the software component. However, I have been unable to find a configuration that causes them to behave in the manner I am seeking.