Changing workflow approval process

Hello, Is it possible to remove or make  the LM approval process the last step when approving expenses? What we're trying to do is to make the LM be the final approval, if the auditor approve it and tagged it as medium/low risk report then no need for LM approval. Only Auditor approval then we can now proceed on exporting it to AP. IF the report needs some 'higher' approval then that's the time the auditor will pass it to LM to confirm if the report can be approved or not. so basically if the report was 'good' then no