How to get current board name and top level board name

Hi,
you should look at the coreNode object here http://community.lithium.com/t5/Developers-Knowledge-Base/coreNode-FreeMarker-context-object/ta-p/9319
You can leverage the ancestors property which gives you all the parents of the current node and from there you can get all the information you need about the community structure.

Thanks,
Nico