---
- hosts: us_asa
  connection: local
  gather_facts: false

  tasks:
    - name: change config
      asa_config:
        auth_pass: "{{ ansible_ssh_password }}"
        username: "{{ ansible_ssh_user }}"
        password: "{{ ansible_ssh_password }}"
        authorize: yes
        timeout: 45
        lines:
          - network-object host 1.2.3.4
          - network-object host 2.3.2.3
        parents: ['object-group network BAD_IPs']

---
- hosts: us_asa
  connection: local
  gather_facts: false

  tasks:
    - name: change config
      asa_config:
        auth_pass: "{{ ansible_ssh_password }}"
        username: "{{ ansible_ssh_user }}"
        password: "{{ ansible_ssh_password }}"
        authorize: yes
        timeout: 45
        lines:
          - network-object host 1.2.3.4
          - network-object host 2.3.2.3
        parents: ['object-group network BAD_IPs']
          - network-object host 4.4.4.4
        parents: ['object-group network Good_IPs']

parents: ['object-group network BAD_IPs']
      - network-object host 4.4.4.4
      ^ here