Is it possible to force DD-WRT to make two different DHCP servers - one for LAN ports, and the second for WiFi?

Question

DHCP

I would like clients connected “over the air” and via copper to be served by different DHCP servers with different settings, * but at the same time, only one router can be used, without additional hardware.
Is it possible? How?
Yes, I see that in setup - networking - dhcpd there is an option to set up multiple dhcp servers. But... firstly, there is something incomprehensible to me about vlans, and secondly, there are almost no settings: only ranges of allocated addresses, and that's it.
* - In particular, I would like to be able to:
a) ... different DNS/gate settings for these two servers;
b) ... at any time disable one of the two DHCP, but at the same time so that the second does not suffer.

Answer 1

To your question "Is it possible" I will answer - it is possible.
How - smoke manuals from dhcpd - the good thing is that what you want is not difficult to do yourself, but you are waiting for a ready-made solution. It is unlikely that anyone will give it to you.