public string PropertyFilterPredicate {get; set;}

//using ArcGIS.Core.Data.Knowledge.Extensions;

await QueuedTask.Run(() =>
{
    var ffp_config = new CIMFilteredFindPathsConfiguration();
    ffp_config.Name = "Run FFP w PropertyFilterPredicates";

    //Origin Entities
    var originEntities = new List<CIMFilteredFindPathsEntity>();

    var origin_entity = new CIMFilteredFindPathsEntity();
    origin_entity.EntityTypeName = "POI";
    //prefix can be anything - foo, bar, fred, n, x, etc.
    origin_entity.PropertyFilterPredicate = "n.name = 'Robert Johnston'";
    originEntities.Add(origin_entity);

    var origin_entity2 = new CIMFilteredFindPathsEntity();
    origin_entity2.EntityTypeName = "EnergySource";
    //prefix can be anything - foo, bar, fred, n, x, s, etc.
    origin_entity2.PropertyFilterPredicate = "s.Source_Name = 'natural gas'";
    originEntities.Add(origin_entity2);

    //etc.

    //Add the CIMFilteredFindPathsEntity to the OriginEntities collection
    ffp_config.OriginEntities = originEntities.ToArray();

    //Destination Entities
    //Same thing, add specific entities using a PropertyFilterPredicate as needed
    var destEntities = new List<CIMFilteredFindPathsEntity>();

    var dest_entity = new CIMFilteredFindPathsEntity();
    dest_entity.EntityTypeName = "Supplier";
    //prefix can be anything - foo, bar, fred, n, x, s, etc.
    origin_entity.PropertyFilterPredicate = "x.Supplier_Name = 'Supplier 84'";
    destEntities.Add(dest_entity);

    //etc.
    //Add the CIMFilteredFindPathsEntity to the OriginEntities collection
    ffp_config.DestinationEntities = destEntities.ToArray();

});