[Bug]: GroupChat stop condition unclear

[zhwuwuwu]

Describe the bug

1. In the definition of a group chat, there are different ways to define when the group chat should stop: max_round, max_consecutive_auto_reply, is_termination_msg, max_turns.
   But it seems only max_round literally works:

        self.group_chat = GroupChat(
            ...
            max_round=4,
        )
        self.group_chat_manager = GroupChatManager(
            ...
            max_consecutive_auto_reply=1,
            # is_termination_msg=lambda x: "TERMINATE" in x.get("content", ""),
        )
        result = self.human_proxy.initiate_chat(
            self.group_chat_manager,  
            message=input,
            ...
            max_turns=1,  # The maximum number of turns in the conversation.
        )

2. Is there a way to customize the stop condition, for example, stop the group chat once after a certain agent speaks?

Steps to reproduce

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Model Used

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Expected Behavior

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Screenshots and logs

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Additional Information

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