Second Ziply Fiber account + service at same address? Two ethernet ports on ONT?

I'm trying to open a second fiber service line at an address that already has existing active Ziply fiber service. It's a single address, not duplex-like "Unit A" + "Unit B" multi-unit addresses.

I want separate billing / account. A router or multiple networks does not solve my problem. Charge us twice!

As I understand, residential ONTs already have 2 ethernet ports that can be individually provisioned as /u/jwvo said here:

the ONT is not actually a dumb switch, it is the service demarc and each port is individually addressable and in fact it is possible to provision them with different services at different speeds that are fully isolated from one another.

https://www.reddit.com/r/ZiplyFiber/comments/i96jlj/are_both_ont_ethernet_ports_live/

So I think this "should" work, but am having a hard time finding anyone at sales on the phone who can actually create the second account at the same address.

It's ok if total speed between the accounts/ONT would be shared, if that's a technical limitation.

Is there any way I can open a second account at the same address? Normal residential service is preferred. If needed I could look into business offerings.