It would seem that A owes a debt to the utility company for unpaid bills, and is making payments in some amount on that debt. Arguably, A also owes a debt to the other residents for having taken their money for the purpose of paying utility bills, and then using it for A's own personal expenses instead. It is possible that the unpaid utility bills may have endangered the credit rating of the other residents, but if the accounts were solely in A's name, that seems unlikely.
One of the other residents could file a court case asking for repayment of the sums paid to A but not properly transmitted to the utility. But if A and the utility (or utilities, if more than one is involved) has entered into a payment agreement accepted by the utility, and A is paying in accordance with that agreement, it is hard to see where another resident, say B, has been damaged. B has received the utility services for which B paid, and the utility company is not demanding payment from B for the bills issued while the account was in A's name. Probably B's credit rating was not adversely affected, because the account was not in B's name.
Unless some of the facts above are incorrect, or B can show some other form of harm that B has suffered at A's hands, it seems likely that any case would result in a decision for A, or an early dismissal of the claim. If there are facts not mentioned above, and B can show some actual harm, then B may get a judgement. But since it seems that A may have little available money, such a judgement may be of limited value to B even if B gets it.
B might do well to consult a lawyer before bringing such a case.
