This feature is unfortunately not at the top of our release schedule. We release 1 to two addons a month. So it may be a few months.
If you are particularly interested in receiving a feature, then you can have us develop it for you. Many of our addons are developed in this way, simply because someone needs it now rather than later.
Our current plans for the search addon are more complex than just the tags, hence the delay. If you would like something developed just for you, we can provide a quote of wordpress development hours needed to accomplish your goals
Let me know