Click "edit" in the corner and then there ought to be a button that says "delete" and then I think you need press delete again, it asks for a reason but you don't need to give one!
valanhb, dawnofsierra, and yosemite are online right now, although mods are assigned certain areas, so see if you can figure out what mod is doing the section where the post you want to delete is.
Most mods can deal with something or get the right person to deal with something if you PM them.
On the main page if you scroll down to the bottom, you can see who is online and the team members are in bold - if you click on 'view forum leaders' and it shows all the mods