bypassing dd-wrt software possible?

My dad is going to get a router that supports dd-wrt and says he wants to lock down everything. I'm 19 and pay rent to live in his house, i shouldnt have restrictions but thats besides the point. He is going to base it off whitelisting websites instead of blacklisting. I think he is going to set the router so that even if the mac address is spoofed the router will not allow internet access until the mac address is authorised. I'm thinking about changing the mac address of my pc to one thats authorised and isnt locked down but he says that the software somehow has a way of detecting that? would it be possible to change the mac address and then clear the ARP cache? I had a conversation back and forth with chatgpt but im not sure if it really got me anywhere. https://chatgpt.com/share/67b8bdef-4bac-8004-9e61-0fb353e15825

Would there be any way to bypass it or do i just have to live with it until i move out?