Clarity

We have a few different scenarios and would like to know if you can cap and/or force a resource to book a certain number of hours?

The easiest way to accomplish this is to set up a process that runs upon Submit of the timesheet.  You could set up rules in the process so that any timesheet that has less than a parameter number, or more than a parameter number will be Returned.  Depending on how fancy you want to be, you could include a notification email to the submitter and/or his/her manager, and you can set up different rules for different classes of users (contractors, exempt employees, hourly employees, etc.

John

Check out the Conditional Automatic Approval process that ships with the application. It automatically approves if the timesheet hours are between 30 and 50. Use it as a jumping point for additional configuration.

(The resource object can be added as a linked object in case you need to branch based on resource attributes)

I see this on a mass level - but cannot figure out how to do it based on an individual resource. 

Add min and max hours as attributes to resource, add resource as a linked object and use the attributes for your process.