Scenario: Restrict access to all operations of the Application Load Balancer only from the Internet Protocol Address 8.8.8.8 (for example, not the real IP).
Policy example:

{ 
  "Statement": [ 
    { 
      "Effect": "Allow", 
      "Action": [ 
        "alb:*" 
      ], 
      "Resource": [ 
        "*" 
      ], 
      "Condition": { 
        "IpAddress": { 
          "volc:SourceIp":"8.8.8.8" 
        } 
      } 
    } 
  ] 
}

For details of the condition key, please refer to the Condition Use Instructions