VLAN setting in dd-wrt

Question

Computer networks

Need help setting up a budget cable connection of 3 different DHCP clients at a distance. There is a provider with dynamic ip and port binding, and three PC clients where each requires its own separate physical port (tariff). The cable is switched immediately to the TL-WR740N with alternative firmware and goes further with one cable through intermediate switches to the final switch / router behind which the clients are, and must receive each of their tariffs, via VLAN via trunk with binding on the router WAN1 - MAC1 - VLAN1 or with some kind of magic.
Edit: read not the DHCP server, but the physical ports of the switch
The provider's switch distributes IP addresses via DHCP (from one server 192.168.35.1), from it there are 3 links No. 1, No. 2 and No. 3 coming to the router with DD-WRT or Open-WRT on board, then one long link with intermediate switches (if necessary, there may also be a router) from which client No. 1 receives link No. 1.
Please poke your nose or chew on the student what to do, I understand networks a little, but I'm still learning, don't hit me hard. Approximately the idea is as follows:
- Assign 3 WAN ports in dd-wrt
- Create VLANs for each incoming link
- Bind client MAC addresses to the WAN ports of the router
- From the router trunk to clients
As a result, client No. 1 with MAC address No. 1 should receive its channel over VLAN No. 1 from WAN port No. 1 from the switch from its port.
I tried to express it the best I could. I will be glad for any help!

Answer 1

@Leviy if, as in your picture, then the router marks each link from the provider with its own vlan and the switch also marks links from computers with the same vlans. And on the highway, let tagged traffic. And in such a scheme, a router is not required, it can be a switch.

Answer 2

Crazy scheme, from the field of dark magic. =)