He means, the 5 slave PCs are not interconnected. They are independent of each other. Blind slaves, if you must. However, they interface to a single master machine for logging purposes, perhaps.
The question is then is it just for monitoring system security? IDS software like Tripwire would work.
But if it's general monitoring purposes... I'm not quite sure what you would need. There ARE however a truckload of Spying software (Realspy, etc.. etc...) that can help you track the system, logging processes, keystrokes, geenral system behavior and email it to a given system...
If it's still not enough... I dunno what can help you.
But I hope I clarified the question enough so that those in the know can help better.