Select the parent part(s)

Open the Filter Parts dialog by Create → Filter Parts...

Turn on the Active toggle for a filter

Select the Variable or coordinate Component to use

Set the Test to <, >, = or !=

If testing against a constant value, enter the value

If testing against another variable, click on the radio button for the variable choose and choose the variable or coordinate Component

If you are specifying a variable in step #7, you can also set the Component for a vector variable

Repeat steps 2 through 8 for more filters as necessary

Click Create with selected parts