Landing Kit was intended for single-site WordPress installations, but you can use it with multisite as well. More
WP Landing Kit KEY FEATURES
Mappable post type options
Compatible with any theme
Post redirect options
Landing Kit enables you to map custom domain names to posts, pages or custom post type entries within WordPress.
This is extremely useful for creating individual marketing or landing pages using singular templates instead of separate WordPress installations or the need for a multisite install.
The cool part is that with Landing Kit you can actually map unlimited domains to unlimited posts, pages or custom post type entries effectively turning your single WordPress installation into an unlimited landing page powerhouse.