Queries give you the most flexibility to filter Items in your Catalog. You can use Queries in the Product Explorer:
You can also use Queries in the Product Explorer within the Project Editor when adding Products to the Project:
You can add/edit/clone/delete Queries in the Product Explorer.
Enter a Name and then add your clauses using the dropdown:
You can Run the query and/or Save the query if you want to re-use it.
To share with all users, click the "Share query with all users" checkbox: