wp have a checkbox in option page to be user specific saved

plugin.php

add_action( 'admin_init', 'register_modal_email_settings' );

function register_modal_email_settings()
{
  if( !get_option( $user->user_nicename . '_plugin_options' ) ){
      register_setting( 'section_email_modal', $user->user_nicename . '_plugin_options', '0' );
  }
  add_settings_section( 'section_foo', 'Foo settings', 'foo_desc', 'foo' );
  add_settings_field( 'bar', 'Bar field', 'bar_option', 'foo', 'section_foo' );
}

function foo_desc()
{
  return 'Description';
}

function bar_option()
{
  $user = wp_get_current_user();
  $checked = $this->email_modal_settings[$user->user_nicename.'_plugin_options'] ? 'checked' : '';
  $name = $this->plugin_slug."[".$user->user_nicename."_plugin_options ]";
  ?>
  <input type="checkbox" <?php echo $checked ?> name="<?php echo $name ?>" />
  <?php
}