Not so much, if the word "Communist" actually means anything.
Really, you only have to think of what communism actually was in those days when Lenin and Stalin were still around to see that Keynes's policy wasn't the expropriation of private enterprises and state ownership and control.
Keynes did have it in for people who lived off investments or rents, though, and supported "the euthanasia of the rentier," -- or the gradual disappearance of the "functionless investor."
It was not to be violent expropriation, but a gradual result of economic change, replacing passive collection of dividends with active investment in the economy -- at least according to Keynes (or what I've been able to find out about Keynes's thinking in five minutes).
Keynes's hostility to inherited wealth and passive investment was strange because he and his friends and associates and the colleges he worked for all benefited from investments, dividends, and inherited wealth.