Above picture is penetration with NetCut for know network in around campus.
For bypass login microtik. You must know MAC address in others client. For know it, you have to NetCut and after install it, this software will searching ip address in one network (microtik).
After found Ip address and MAC address, you must have copy MAC address to LAN configure. It's step LAN => right click (properties) => Networking (click configure)=> Advanced => Network address (put in here).
And the second step is change active ip address in LAN properties.(note: IP address and MAC address must valid and same). Let's try it. Have fun full access internet. :D