A few questions...

Is it possible to have online multiplayer (register, login, play) with my games?

If so is there a nice neat way for me to set up a server?

And is it possible to make a scoreboard on my webpage for my games?

Yes

No

Yes

You were expecting detailed information on how to do this?

No, just wanted to know if it was possible. Thanks.

I like figuring things out on my own.

Here ya go,

1-

scirra.com/manual/153/websocket

2-

I really have no idea. I think you can do both peer to peer or everyone talks to a server. Ajax, and Sockets are where you need to look. You can also pass things to the commandline with node-webkit so you can probably issue SSH and FTP commands too, if the firewall lets you through.

3-

scirra.com/tutorials/421/how-to-talk-to-the-page-your-game-sits-in

Compliments of Goolge, and using the search term Scirra rather than Construct 2.

Looking forward to the day we can start using the built in forum search again.

If you think finding multiplayer info is hard, try finding a regex tutorial with google. Seems like every OS and programming language in existence uses it. None of them use it exactly the same way it seems.