Sometimes people are a bit confused about LOB segments 🙂 That’s why I am here to remind you the DBA_LOBS table .. that’s your best friend here
SELECT owner , table_name , column_name , segment_name FROM dba_lobs WHERE 1=1 AND segment_name IN ( SELECT segment_name FROM dba_segments WHERE 1=1 AND owner = 'JOHNNY' AND segment_type = 'LOBSEGMENT' -- or LOB SUBPARTITION, LOBINDEX, LOBÂ PARTITION )