[lxgr]

What do you mean by "tethering an iPhone to a PC"? iPhone Mirroring does not grant the iPhone any privileges to data on the Mac, as far as I know.

Also, there are two orthogonal concerns at play here: Companies generally don't want personal devices (at least those not covered by MDM) to hold company data, but companies also might not want to inadvertently hold personal data of their employees.