Two MACs For One IP

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The reason I want to assign one IP to two MAC addresses is that I have one
(and only one) user for whom I have to spoof the MAC address (it’s a case of stupid software licensing). But… his system is encrypted. Now, we’re using clevis to allow reboots without someone being at the keyboard to type in the password. Those of you who’ve looked at clevis see where this is going: clevis uses the *real* firmware MAC address to get the key from the latchset server… while currently, the dhcpd *only* knows the spoofed MAC address.

After the system’s unlocked, it boots, and comes up with the spoofed MAC

It *appears* I can do this, but I thought I’d ask here if there were any issues that dhcpd itself would have if I do.