How to configure a static IP for a specific access point on OS X?
I have found it myself. It's already built in in OS X. In System Preferences, goto Network and at the top of the window, you can see a combobox which says: Location. You have to click it and select Edit Locations.



At this picture I have already created my Home Network.

Create and configure the Home network. And click Apply afterwards. Close the window.

From now on you can choose which configuration (or Location) you want to use by opening the Apple-menu () in the Menu Bar. And choose from the Location submenu.