How to dynamic select options each webforms seperately?
I don't entirely understand your question, but I believe that you want to customize a webform based on the user currently logged in.

To do this you can use hook_form_alter.

All webform have an ID that starts webform_client_form_ so you check check for this, and then make any modification as necessary.

E.g:

function MY_MODULE_form_alter(&amp;$form, &amp;$form_state, $form_id) {

    //drupal_set_message("Form ID is : " . $form_id);

    if(substr($form_id, 0, 20)=='webform_client_form_') {

        global $user;

        // make changes to form here

    }
}