The holy grail of wireless convergence is to appear seamless between wired and wireless connections. Towards that goal, the wireless is ahead of the wired because you HAVE to implement a NAC (network access) solution for wireless security. If you do the same types of access models on your wired connections, it wouldn’t matter what, where or who connects to your network. You are basically secured at the edge of your network.
Yes it can be done. I am 95% sure. The concept is called router on a stick, where one interface can be divided into subinterfaces and be given IP addresses.
Hope this helps.