Yes. The ATLAS can do this.
Your configuration will all be under the DIAL PLAN. The Telco PRIs will be configured under the NETWORK TERM, each with an OUT#ACCEPT of "$", and the customer PRIs will be configured under the USER TERM, and you can specify the DID's, or DID range under the IN#ACCEPT list.
I would also configure one user PRI with a SOURCE ID of "1", then under the NETWORK TERM, configure the associated Telco PRI's OUT#ACCEPT to accept the SID=1. This will keep outbound calls from one customer on the associated PRI to the telco. Otherwise outbound calls would all go out the first PRI until it was full, then start on the second PRI.