notice the last 6 digits are the same with the ID and with the MAC, only the first 6 are different.
This holds true with every type of IPTV device with an onboard iptv app.
The MyTVOnline app onboard your T3 device is such an app.
-The MAC is the device's MAC (the T3's MAC).
-The ID is the IPTV app's MAC ... with 00:1A:79 as Ryu showed us.
The IPTV app (MOL) is what connects online and is why it's MAC ID is needed (with the 00:1A:79 prefix).
The Dreamlink T3 device itself does not connect online, only it's apps onboard do. And is why it's MAC ID is not used.