Network cards

[majidemo]

I have a dedicated host with 2 (local area connection).
How do I add more to this without adding a physical network device.
Like when using virtualbox you can add more local area connection than your physical network card.

I need to add "local area connection 3" and "4" And use the available ips from my provider.

Because I have 5ips and is only using one. I know you can add more ip to 1 local area connection, but I want it to be separated.

THANKS..