Фильтр со сложной логикой
$arFilter = array(
"IBLOCK_ID" => $IBLOCK_ID,
"SECTION_CODE" => "orange",
"INCLUDE_SUBSECTIONS" => "Y",
array(
"LOGIC" => "OR",
array("<PROPERTY_RADIUS" => 50, "=PROPERTY_CONDITION" => "Y"),
array(">=PROPERTY_RADIUS" => 50, "!=PROPERTY_CONDITION" => "Y"),
),
);