[zenTHEgreat]

Wireshark is capable of those things you just listed. You can also use Fiddler, but that's more to view traffic on your own network instead of also other networks/pc's.

Usually there's a source and destination MAC-address as well as IP-address.

Is wireshark capable of viewing vpn connections to your network ? or any other hidden connections to your network?

Wireshark only monitors whats going in and out of your machine. There are ways around that, like preforming a Man in the Middle Attack.

Interesting I've heard of a Man in the Middle attack, do you have a link or possibly an article to point me in the right direction so I can get a better understanding of it.