This IAM Policy denies any request if it doesn't originate from the explicitly mentioned IP address.

deny-policy-not-matches-ip.json

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Deny",
            "Action": "*",
            "Resource": "*",
            "Condition": {
                "NotIpAddress": {
                    "aws:SourceIp": [
                        "YOURIPADDRESS"
                    ]
                }
            }
        }
    ]
}