Tizen Developers

You can check the ip using this piece of code:

.js

$(document).ready(function () {
    $.getJSON("http://jsonip.com/?callback=?", function (data) {
        console.log(data);
        alert(data.ip);
    });
});

index.html

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script>

But this would show you the Public IP that your PC uses to reach Internet, Which is logical, cause:

Tizen Web Simulator is not actually an emulator/virtual device with dedicated memory and all that stuff. Rather it is a Browser with TV screen resolution and some TV remote event handlers, which loads the html file from your Tizen-Studio workspace like:

file:///home/ALVARO_Aguilar/workspace/testProject/index.html

Web Simulator Ref.

What you may try is to send data from your tizen app to MAMP server running on localhost (127.0.0.1) using XMLHttpRequest/ajax or any other means.