I assume that you are using IP spoofing in NeoLoad and it's enabled.

In that case if you would like to check which login is used with which IP addresses, you will have to use a javascript.

In the javascript, you will be able to log the user and IP information.

Here is a sample:

context.currentVU.getIP(); // to get the current IP

var User = context.variableManager.getValue("New_User_login.SBI_USER");
logger.debug("My user login is : " +User);

Does it suit your needs?