If you don't send your coins to/from an IP obviously
Say you generated a block of 50 coins (ie. didn't buy them anywhere, no trail yet) and then spent them from your machine later to purchase something you didn't want anybody to know about. Or the funds just happen to go to an unscrupulous individual in general and when he cashes them out them somebody wants to speak to you (the person who funded him) for some reason or another let's say.
Could somebody tell simply by looking at the block chain or other factors what ip address sent or generated what coins?
I know messages can be sent with blocks. Is any information related to the owner's computer stored at all in the block chain basically is my question?