Yes, a writ petition filed by the aggrieved person, whether on behalf of a group or together with a group can be treated as a Public Interest Litigation, however,
- The writ petition should involve a question, which affects the public at large or a group of people, and not a single individual.
- Only the affected / aggrieved person can file a writ petition.
- There should be a specific prayer, asking the court to direct the state authorities to take note of the complaint /allegation.
Public interest litigation can be filed as writ petitions for violation of legal or fundamental rights, criminal complaints under the Criminal Procedure Code, Environment Protection Act and Consumers Protection Act as well as for compensation for tortuous and negligent acts and upholding of civil rights in the civil courts.
To read more about the Types of Writs, aspirants can check the linked article.