Ability to narrow the search with the search tags to specific fields

For the pressContainer in the web_templates there once was the requirement to use the search tags. but search only in one particular field (the file field of the press container). Unfortunately we can for page search only set either "content" or "metadata" or "all". It would be cool if we could limit the search just to particular fields. We once already had a chat with Sergiy about that and agreed that it should be quite easy to specify something like

content(content_fields,...),metadata(metadata_fields,...)

to limit the search just to one or more specific fields.