Live search to be able to only search labels in a specific space

I have a user who wants to use the site search that allows the user to enter their own query, whilst at the same time only looking at one space and a specific label. This feature is not available in any of the search features available in confluence, either core features or plugins (including those available from third parties).

What is required is the ability to specify which type(s) of content that should be search when the livesearch is executed. This should also include the labels used to desribe content.

For example:

• {livesearch:id=1|spaceKey=KEY|type=label}

  would search labels only

• {livesearch:id=1|spaceKey=KEY|type=page, news}

  would search pages and news only