Which version of phpbb are you running? Either way you will need to install several mods onto your forum. Unless you have knowledge of php, html/css, and the inner workings of phpbb your not going to be able to make these yourself, you will have to find mods created by others and install them onto your forum.
If your running 3.x...
This is a cash mod (
http://www.phpbb.com/community/viewt...?f=70&t=547021). I can't comment how good it is or how close to what your wanting. There is a warning system, but I don't think its setup as you would like (
http://www.phpbb.com/community/viewt...?f=69&t=597284).
If you are running 2.x... (not recommended you use this version as it is no longer supported by the phpbb development team/website)
Here is a cash mod for phpbb2 (
http://www.phpbb.com/community/viewt...p?f=15&t=94055).
Now keep in mind the d2jsp forum isn't using any prepackaged software. The webmaster of that site created the forum from scratch, it is entirely unique to every other forum on the internet. To get functionality closer to that you should look into vbulletin or ipb (not sure about ipb as I have never administrated one of those boards). I know vb has built in warning, and have a very good gold mod you can install called vbcredits, which has a shop addon called vbcommerce.
No matter what forum you use, or what mod chances are its not going to be exactly what you want, or be as close to d2jsp as you like. It might still require custom modification.