begin 
FOR REC IN (SELECT USERNAME,PROGRAM,MODULE,TERMINAL,MODULE_HASH FROM V$SESSION
WHERE AUDSID = USERENV('SESSIONID')) 
LOOP
if rec.username not in ('SYS','SYSTEM','ABBC','XYZ') 
and
upper(rec.terminal) not like '%Computername%'
and
(rec.module is not null
OR
upper(rec.program) like '%EXP%'
OR
upper(rec.program) like '%IMP%'
OR
upper(rec.program) like '%VRMGR%'
OR
upper(rec.program) like '%EZSQL.EXE'
OR
rec.program is NULL 
OR
upper(rec.program) like '%TOAD.EXE')
then
RAISE_APPLICATION_ERROR(-20001,'Sorry You are not Authorise to Logon from this tool');
end if;
end loop;
END;