WOW.
How would I go about doing this?
(Two possible options: get the IAP275 connected to an internet connection so that both the camera and your Mac connect to it (the IAP275), and from there the Mac can access both the camera as well as the Internet.)
The IAP275 is connected to Mac via Cisco switch, and its Powered over Ethernet, is it possible to internet that way as well?
(My experience has been it's easier to get the IAP275 wired to Internet access than to add a second wireless adapter to macOS, but depending on how/where the IAP275 is installed, that may not always be the case.)