Enable plugins for a specific user role

You can try something like this

if ( is_myrole() )
{
add_action( ‘some_menu’, ‘my_plugin_menu’ );
}

function my_plugin_menu()
{
add_options_page(‘My Plugin Settings’, ‘My Plugin’, ‘manage_options’, ‘my-plugin-settings’, ‘my_plugin_admin_page’);
}