Unfortunately, there is no "in like" operator. You could break it up to a series of LIKE conditions like @Elfentech suggested, or you could emulate it with the REGEXP_LIKE function:
SELECT *
FROM   employees
WHERE  salary BETWEEN 2500 AND 10000
AND    NOT REGEXP_LIKE (job_id, '.*[MAN|CLERK].*')
Alternatively, you could join on a bunch of UNION ALL queries from dual:
SELECT *
FROM  employees
JOIN  (SELECT 'MAN' AS search FROM dual 
       UNION ALL
       SELECT 'CLERK' FROM dual) jobs 
ON    employee.jod_id LIKE CONCAT ('%', jobs.search, '%')
WHERE salary BETWEEN 2500 AND 10000