この変更も必要なようです。

●/data/class/SC_CustomerList.php

//　名前（カナ）
if (!isset($this->arrSql['kana'])) $this->arrSql['kana'] = "";
if ( strlen($this->arrSql['kana']) > 0 ) {
if(DB_TYPE == "pgsql"){
$this->setWhere("(kana01 || kana02 LIKE ?)");
}elseif(DB_TYPE == "mysql"){
$this->setWhere("concat(kana01,kana02) LIKE ?" );
}
$searchKana = $this->addSearchStr($this->arrSql['kana']);
$this->arrVal[] = mb_ereg_replace("[ 　]+","",$searchKana);
}
○この下に、下記を追加する。



//　会社名
if (!isset($this->arrSql['company_name'])) $this->arrSql['company_name'] = "";
if ( strlen($this->arrSql['company_name']) > 0 ) {
$this->setWhere( "company_name Like ?" );
$this->arrVal[] = $this->arrSql['company_name'];
}

//　部署名
if (!isset($this->arrSql['section_name'])) $this->arrSql['section_name'] = "";
if ( strlen($this->arrSql['section_name']) > 0 ) {
$this->setWhere( "section_name Like ?" );
$this->arrVal[] = $this->arrSql['section_name'];
}


●data/class/pages/admin/customer/LC_Page_Admin_Customer_Edit.php

//---- 入力エラーチェック
function lfErrorCheck($array) {


$objErr->doFunc(array("会社名", 'company_name', MSTEXT_LEN), array("EXIST_CHECK", "MAX_LENGTH_CHECK"));
$objErr->doFunc(array("部署名", 'section_name', MSTEXT_LEN), array("MAX_LENGTH_CHECK"));