An Ant Colony is just as much an organism as a single ant. You can not call two ants in the same colony different organisms any more than you can call one's nervous system and immune system different organisms. They function independently but symbiotically in order to survive. The immune system has its own intelligence free of manipulation by the nervous system.

And much like how a single organism works, a society has different mechanisms for different tasks, creating an interdependent network in order to survive. In this way, we are all cells within a larger organism. This organism may be a company, a city, or even a religion. Some of these feed-back loops are negative, acquiring homeostasis in order to survive most efficiently. Some of these feed-back loops are positive, such as a monstrous, conquering corporation or inquisitorial religion, which continue to build energy until they erupt like a tornado before dwindling off into nothing. They are simpler, less complex organisms than the biological consideration, but they are essentially still a bundle of organized feedback loops and in the end that's all the definition one needs to describe life.