“Restrict Registration” is a plugin for WordPress that allows you to control 
who is registering on your blog. This plugin uses simple blacklists and 
whitelists to define who can register for your blog, and who is restricted. Use 
simple literal matching, flexible asterisk wildcard matching, or powerful 
regular expression matching: it’s your choice! The options page is clear and 
easy to use. Set your lists, and you’re done!
This plugin was inspired by WP-Deadbolt, but has been completely rewritten and 
redesigned, and several new features have been added.

Restrict Registration

Use simple blacklists and whitelists to control who can and cannot register on your blog.

PrecursorWeb

This WooCommerce plugin enables order restriction based on specific zip/post codes. You have to enter list of postcode in given area for which the order restriction works. When activated you will restrict selected gateways or billing address, shipping address and both address at checkout step based on specific zip/post codes.
There are a few requirements for this plugin to run.
<ul>
<li>WooCommerce 2.3.0 or higher</li>
<li>WordPress 4.0 or higher </li>
</ul>
The postcode based order restriction plugin has been tested with the current versions of WordPress, WooCommerce, the WordPress themes.

Postcode Based Order Restriction for WooCommerce

This plugin enables order restriction based on specific zip/post codes in a WooCommerce shop.

Restrict Registration vs Postcode Based Order Restriction for WooCommerce