Where in the APP do i find the MAC Addresses of the Z-Wave connected devices?
Welcome!
Z-Wave devices don't have MAC addresses. What are you trying to do?
I have a couple of unidentified devices on my network, since Z-Wave devices don't have MAC addresses I have to modify my question. Do the have IP addresses that can be seen in the APP or page?
No, z-wave doesn't run over TCP or UDP. So z-wave devices don't have unique IP addresses. Z-Wave devices do have unique node ids that are assigned during pairing, and which can be found on the z-wave settings page.
The only identifier the hub has for the Z-Wave device is the node ID, which is assigned by the hub to the device at the time of inclusion (but that won't really help you find the device since nothing about this comes from the device and it's more or less sequentially assigned by the hub). Some devices may also report their serial number in a report that the driver might parse into data displayed in the "Device Data" table on the "Device Info" tab, and it's possible you'd find matching information printed somewhere on the device in such cases. A quick look at various devices I have shows that for only a few.
If it's a mains-powered device, maybe you could run a command that would help identify it, like on/off, tone play, lock/unlock, or whatever kind of device you're looking for -- or something the other way around with a bit more work for sensors if you have Logs open (and descriptionText logging enabled) and work one room or so at a time. 
(Assuming that is what you mean with "unidentified Z-Wave device", I suppose...)
Can you clarify what network you are referring to?
- The z-wave mesh network for which your hubitat is the controller?
- Or your home LAN/WLAN (WiFi network)?
ZWave and zigbee devices will not show up on your home LAN/WLAN.
@panacity post your z-wave table in it’s entirety (use windows snip)