I want to know how to implement Multi PDN communication with WP76XX and Legato API

Hi All
I will develop a location application for use in a closed area network.
This application also requires an internet connection to receive GPS assist data from the SUPL server.
For example,

CID1 = Closed area network APN
CID2 = Internet APN

Please tell me how to establish CID1 and CID2 and multiple PDNs at the same time.