This is a much bigger issue - it all depends on what type of controls you are needing (I do not think one solution is going to be the answer).
If the idea is to validate content they create, you might need to use something like VCO and VCD's task model - and create a copy and validate content on creation / import into catalog - based on your rules.
For network you can place firewalls to prevent some traffic, but you need to find the traffic, for that you would need to get a flow monitor tool, but unless you know what you are trying to catch it could be a real pain.