The short answer is, "No."
If you have the same MAC address on two hosts on the same layer-2 network, you will have problems. Switches learn the MAC address which is connected to each port as frames come into the ports, and they populate their MAC address table with this information. A switch will then send frames destined for that MAC address only to that one switch port from its MAC address table.
When you have the same MAC address on more than one port, the switch's MAC address table will constantly be changing, and some frames will be delivered to one port, and some frames will be delivered to the other ports. You will not duplicate the frames to multiple ports.
This is called MAC spoofing, and it is a common DoS attack on LANs to disrupt the LAN. This can be mitigated with LAN security features such as DHCP snooping an ARP inspection.