This plugin will protect the posts content from copying by disable right click and disable selecting text. You can exclude pages and posts.

Bali Mechanic Media

Mechanic – No Right Click

Mechanic - No Right Click previously BMT - No Right Click is a tiny plugin to not allowed right click, CTRL A, CTRL C, CTRL S, CTRL U, CTRL P and F12  …

Mik28

Protect My Contents

Protect the contents of your site with Protect My Contents plugin. Blocks the content thieves and deny the copy&paste, CTRL+C.

Kazuki Yanamoto

WP Content Copy Protection with Color Design provides you security for wordpress website. 
It protects from copying the content, stealing data, and also images from your pages. 
You can also exclude pages and posts.
If someone right click, It`ll show an alert window with messages. You can change the color of the alert window that matches to your web site.
WP Content Copy Protection selecting texts, and disable drag and drop images to your computer. 
By not selecting texts, users cannot CTRL+C, CTRL+A, CTRL+X, CTRL+V and CTRL+P.
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You can also disable right click without giving the alert window.
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You can change the alert messages by yourself.
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You can exlude login users from the option page.
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You can exclude pages and posts.
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You can protect only specified pages and posts.
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You can protect print preview page (CTRL+P).
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