1) If the business was a corporation or LLC, you may not sue the CEO, board members or other officers/managers; you may only sue the business itself.2) The employees may not sue for breach of contract if they were not themselves signatories or parties to the contract.3) Employees may sue for unpaid wages if they did work for which they were not paid.4) For either a breach of contract or unpaid wages claim, you may not recover emotional distress, punitive damages, or for things like eviction, foreclosure, etc. You can only sue for direct economic losses--i.e the unpaid wages, or any amounts owed under a contract.5) If the claim or debt you are suing over arose before the Ch. 11 was filed, you most likely cannot bring it--though since bankruptcy is a complex subject, you are advised to consult with bankruptcy counsel in regards to this.