1. Autonomous weapons: Also known as "killer robots" or "lethal autonomous weapons systems (LAWS)," these AI-powered systems can select and engage targets without human intervention. Many experts and organizations have called for a ban on autonomous weapons, citing ethical concerns and the potential for an AI arms race.

2. Facial recognition technology: Some jurisdictions have imposed restrictions or bans on facial recognition technology due to privacy concerns, potential biases, and the risk of misuse by governments or law enforcement agencies. For example, San Francisco, Portland, and Boston have banned the use of facial recognition technology by local law enforcement.

3. AI for surveillance: The use of AI-powered surveillance tools, such as predictive policing or social credit systems, has raised concerns about privacy, civil liberties, and human rights. Some countries and regions have implemented regulations to limit the use of such technologies or prevent their abuse.

4. AI in hiring and recruitment: AI-driven hiring tools may introduce or perpetuate biases and discrimination in the recruitment process. Some jurisdictions have implemented or are considering regulations to ensure fairness, transparency, and accountability in AI-based hiring decisions.

5. Deepfakes: AI-generated fake videos, images, or audio recordings, known as deepfakes, can be used for disinformation, blackmail, or other malicious purposes. Some countries have proposed or enacted legislation to criminalize the creation and distribution of deepfakes in specific contexts.

It's important to note that regulations and restrictions on AI technologies are continuously evolving, and the legal landscape varies widely between countries and regions. To understand the specific AI restrictions in a particular jurisdiction, it's best to consult the relevant laws, regulations, and guidelines.