When defining your MetaBox before registering it, just set the PostTypes it is applicable for:
$f711_meta_boxes[] = array(
'id' => 'details',
'title' => __( 'Details', 'f711_theme' ),
'pages' => array( 'publicity' ), // change this values
'context' => 'normal',
'priority' => 'high',
'fields' => array(
array(
'name' => __( 'Fischi ist', 'f711_theme' ),
'desc' => __( 'Jaja, Beschreibung', 'f711_theme' ),
'id' => 'f711_is',
'type' => 'select',
'options' => array( __( 'gut', 'f711_theme' ), __( 'super', 'f711_theme' ))
)
)
);