for what you want to monitoring?
if only for keyboard – keystrokers like this: https://www.actymac.com/KeystrokesWatch/ – simple and easy to use.. https://www.protemac.com/KeyBag/ – not bad logger too. PRO-version can remember all system passwords.
if you want to monitoring all the activity on the mac, try this: https://www.actymac.com/DutyWatch/ – very good monitoring programm, it’s very help me few times. DutyWatch-Remote can send reports on your ipod/iphone/ipod touch…
hope some of this can help you)…