<human>: Lately, I have been going over my internet limit (30GB) and couldn't figure out why. I mentioned this to a friend and he looked up how many people are connected to the network and the usage for the past month. It turns out that someone else is connected to my internet and there was activity while I was away during winter break. The only information we could gather was that the user's computer is name "OMEGA".

I live in a small apartment. I'm on the third floor (2 other people live here as well), and the floor under me has about 4 single apartments. The first floor probably has 3 people living there.

When I moved in, the landlord offered to include internet in my rent for $20 a month but opted not to. The landlord has been pretty cool with me (despite my smoking), but now I think I figured out why. He is the only person who has access to my apartment (I live by myself) and have found him on multiple occasions letting himself in without any warning for bullshit reasons ("i wanted to check if both your windows were closed"). 

Now, my question is how should I deal with this? Is it possible to find out who has my internet? Secondly, could I accuse my landlord without concrete proof? Should I go to the police? I live in Quebec, Canada by the way.

My friends and I were thinking about knocking on the neighbour's doors asking them to do a survey. We would ask about internet usage, companies, computer names, etc and try to figure it out from there. But I don't know how far this would take us.

Can you give me the gist of the text in a nutshell?
<bot>: I think my landlord stole my internet password and is selling it to a tenant in my building. How do I figure out who it is? how should I deal with this?