The Condition Designer (1) has a similar look and feel as the standard "Advanced Find" Dialog in Dynamics365.
Also, the available options are similar.
The Condition Designer (1) is part of the Condition Field functionality of DocumentsCorePack. Details
about this functionality can be found here.
Figure 1: The condition designer within the condition field dialog
This step by step description will show you how to the condition designer to create your condition.
PLEASE NOTE: A few fields like owner or customer (special look up fields) are not available on the actual parent level, but can be always reached by selecting the next level drop down for this element.