In case you need to make sure only users from US can leave comments on your posts or simply to reduce the amount of spam, you can restrict anybody to post comments if he/she is not coming from US IP space.
This policy requires that you also have at least a free-tier ipstack service.
{
"Version": "1.0.0",
"Dependency": {
"wordpress": ">=5.2.4",
"advanced-access-manager": ">=6.3.3",
"${CONST.AAM_IP_CHECK}": {
"Name": "IP Check",
"Version": ">=4.1.0",
"URL": "https://aamplugin.com/pricing/ip-check"
},
"${CONST.AAM_PLUS_PACKAGE}": {
"Name": "Plus Package",
"Version": ">=5.2.4",
"URL": "https://aamplugin.com/pricing/plus-package"
}
},
"Statement": [
{
"Effect": "deny",
"Resource": [
"PostType:post:posts"
],
"Action": [
"Comment"
],
"Condition": {
"NotEquals": {
"${IPSTACK.country_code}": "US"
}
}
}
]
}