$sql = " SELECT a.gr_id, a.gr_subject, a.gr_use_access, b.mb_id FROM $g4[group_table] AS a LEFT JOIN $g4[group_member_table] AS b ON a.gr_id = b.gr_id WHERE (b.mb_id = '$member[mb_id]' AND a.gr_use_access = '1' ) OR a.gr_use_access = '0' and gr_2 = '1' ORDER BY a.gr_1";

여분필드 'gr_2'에 '1'을 입력한 글룹만 보이게 됩니다.

감사합니다 폴록님 ^^