The first thing you need to do is make sure to send a URL for each category, as part of the feed.
When all the necessary category data is being sent, extend your live-search embedcode to include all of the following (or copy the entire code if you havent installed it yet):
HTML
<span
class="clerk"
data-bind-live-search="INSERT_CSS_SELECTOR_HERE"
data-template="@INSERT_TEMPLATE_ID_HERE"
data-live-search-categories="true"
data-live-search-categories-title="Categories"
data-live-search-products-title="Products">
</span>
Here is a description of what the attributes do:
The live-search will now be split in two sections, showing both categories and products: