Safari - Allow Cross-Site Tracking Only Between Specified Sites?

I think I know the answer to this, as there’s no apparent setting for it, but does anyone know a workaround to allow cross-site tracking in Safari for only certain sites? The setting on the Mac is to have it completely on, or completely off.

My use case is that I use an Office 365 mail add-in for my firm’s case-management system (Filevine), to post Outlook emails into Filevine, and it only works with cross-site tracking protection turned off (I presume so the two services can interact to some level).

I’d rather not disable it completely, and on my iMac I use an alternate browser, but on my MacBook I like to use Safari for the battery benefits.