Set Default Fedex Account By Workstation?

Hi, we have Shiprush Fedex set up on a server with workstations accessing the server.

In Shiprush, we have 7 Fedex accounts set up.

It seems on all workstations the same default Fedex account is listed first. Some workstations ship on certain accounts 100% of the time.

Is there a way to set the default account by computer so workers don't have to always pick one from the dropdown list? Their "default acct" would be listed first one their machine?

Is there an ini file or config file on each machine where this could be set or is there another way?

Thanks!