A. Create a Custom Action Condition related to the Add Products Custom Actionwhere:
Target Object is Quote
Field is Family__c
Filter value is Product Family

B. Create a Search Filter related to the Add Products Custom Action Where:
Target Object is Quote
Target Field is Family__c
Operator is Equals
Filter Source Object is Product
Filter Source Field is Product Family
Hidden is True

C. Create a Custom Action Condition related to the Add Products Custom Action where:
Target object is Product
Field is Product Family
Filter Value is Family__c

D. Create a Search Filter related to the AddProducts Custom Action Where:
Target Family is Product
Target Field is Product Family
Operator is Equals
Filter Source Object is Quote
Filter Source Field is Family__c
Hidden is True.