No need for Apple to engineer this.
The AirPort Extreme has had the ability or feature that you ask about for over 5 years. It's called Timed Access.
This allows you to set up daily time limits for each wireless device that connects to the network. The setting is accessed using the Manual Setup option in AirPort Utility.
Different devices can have different "rules".
So, for example you could set up your own computer for "Unlimited" access at any time while the kids' iPhones or laptops will only be able to connect to the network between say 8 AM and 10:30 PM each day.
If you cannot locate the TImed Access settings in AirPort Utility on your Mac, post back to let us know what operating system your Mac is using.
If you are not sure about that, click the Apple icon in the upper left hand corner for the screen and then click About this Mac to see the version of OSX that your Mac is using.
Bill: I am sorry - I think I did not explain it well. I am aware of the method to do access control - which actually has its own problems; in this, I need to provide the mac ID as it does not identify the device - the part that identifies the device does not have access control or on and off buttons. It is the ease of use that I ask them to engineer not the functionality (similar to drag and drop vs. right click and delete or move). the access control works better on the device itself; you can pick this computer and say that this is limited to this time etc. But the great utility app that I have on the iphone will be greater if I can have a button to turn on and off the wifi connection to the particular device...
Also if the app tells me what each device does in terms of websites visited etc - will be great. (My son was able to find that our neighbor was downloading a lot of Japanese Anime when we had open internet)
BTW - as I type this, I see my kids (12 and 16) playing games on their devices with out wifi - I guess I cant win...
As you know, this is a user to user forum area, so it is extremely unlikely that anyone from Apple will see your post.
Your best option is to contact Apple directly with your feedback.
Unfortunately, Apple has dropped a number of features from the latest version of AirPort Utility, so that might provide a peek at their future thinking for new versions.
But, it cannot hurt to tell them what you would like to see.
Please start a new post for this separate question including the make and model number of your printer, any troubleshooting steps that you have already performed, whether this is a case of the printer working before and not working now....or it is a new printer that you are trying to configure, etc.