I'm aware that you can target specific printers via the individual Item-level targeting
to a subnet.
I have about 20 printers that I would rather put the full group policy into maybe a WMI filter for a subnet 192.168.0.x. That way when a jr tech adds this and forgets to add the item-level targeting this will take care of it's self.
How would you target the full group policy object?
You can use a WMI filter, but it's really ugly and unintuitive. There's no way to do this with Item-Level Targeting, as it only applies to Group Policy Preferences, which are a subset of configurable GPOs.
I always refer to this blog post when I need to do this instead of using Item-Level Targeting for some reason.
The WMI query that you'll be filtering on (from the blog linked to above) is:
In the example that you've provided, you probably want to use something like: