Executing Apex code in controller only for specific profile

You can query the user object to find out which profile the current user has:

List<User> u = [SELECT ProfileId FROM User WHERE Id = :UserInfo.getUserId()];
if(u[0].ProfileId == 'some profile id'){
     //your code
}

Then you can either specify the id in a Custom setting, or hard-coded, if the case allows that.

You could use the code below. You would need to create a Set called setOfAllowedProfileNames that contains all the ProfileNames that you'd like the code to run for. The Set could be built from a CSV custom setting, or Custom Label.

The benefit of this approach is that you are specifying the profile names rather than than the profile Ids, which will vary in different orgs.

private Set<String> setOfAllowedProfileNames {
    get {
        if (setOfAllowedProfileNames == null) {
            // Build the set...
        }
    return setOfAllowedProfileNames;
    }
    set;
}

private String currentUsersProfileName {
    get {
        if (currentUsersProfileName == null) {

            currentUsersProfileName = [
                select Profile.Name 
                from User 
                where Id = :UserInfo.getUserId()].Profile.Name;
        }
        return currentUsersProfileName;
    }
    set;
}

private Boolean isUserInAllowedProfiles {
    get {
         if (isUserInAllowedProfiles == null) {
              isUserInAllowedProfiles = setOfAllowedProfileNames.contains(currentUsersProfileName);
         }
         return isUserInAllowedProfiles;
    }
    set;
}

I believe you can also opt for hierarchy custom setting option for your scenario as it will provide the ability to perform different action based on logged in user/profile on apex classes. For more details ,follow the below link

• http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_System_HierarchyCustomSetting_instance_methods.htm

Regards Anchal Garg