How to redirect user to other location in according to the country he came from (by IP address)

You can add code for redirection into Application_BeginRequest method in ~\App_Code\Global.asax.cs file (e.g. right before "switch (URLRewriter.RewriteUrl())" line). Please find sample code bellow:

        string ipAddress = HttpContext.Current.Request.UserHostAddress;
        IP2CountryHelper myCountryHelper = new IP2CountryHelper();
        string currentCountryName = myCountryHelper.GetCountryByIp(ipAddress);
        string currentDomain = CMS.GlobalHelper.UrlHelper.GetCurrentDomain().ToLower();

        switch (currentCountryName)
        {
            case "UNITED KINGDOM":
                if (currentDomain != "www.mysite.co.uk")
                {
                    Response.Redirect("http://www.mysite.co.uk");
                }
                break;
            case "AUSTRALIA":
                if (currentDomain != "www.mysite.com.au")
                {
                    Response.Redirect("http://www.mysite.com.au");
                }
                break;
            case "CZECH REPUBLIC":
                if (currentDomain != "www.mysite.cz")
                {
                    Response.Redirect("http://www.mysite.cz");
                }
                break;
            //...
        }
 

You can find appropriate names of countries in ~\App_Data\CMSModules\WebAnalytics\IP2Country\ip2country.dat file - you just need to rename this file to .zip and extract and view ip-to-country.csv file included.