Nope, sorry has nothing to do with numbers.
The privilege level has to do with a hierarchical way of determining which extensions can use a route given the privilege level associated to an extension.
While it may be easy to think of the privilege level having to do with a set of numbers that might be used for internal, local, national or even international dialing such is not the case unless one purposely aligns the dial strings for the locale with that of the privilege and rule.
It is merely a way of setting a security level by which an extension is allowed to use a rule.
If you have set a rule, regardless of what the dial string is, as international, then only those extensions that also have an international privilege can use that rule. However, because international is a higher level than the other levels, they can dial the other rules that are national, local, etc… However, an extension with a local or national level cannot dial out using a rule for international as they do not possess the privilege level to access that rule. You can use whatever dial string you please in any rule and then restrict the access by setting a privilege level or user source callerID.