Stan is strict about being Australian. Its help centre says Stan is "only licensed to operate within Australia, and this means there are geo-blocking restrictions in place to prevent any overseas access". Try from another country and you get an error code instead of a show: L8 when signing in, A26, L1 or C11 when streaming, DL9 when downloading (Stan's error codes).
VPNs get the same answer. Stan's pages say "You will not be able to access Stan if you have a VPN or custom DNS service enabled", and C11 is the code for that case, which can appear for people inside Australia too (Stan, error C11). That is the difference from Netflix or Prime Video, where a VPN picks between libraries: outside Australia there is no Stan library to pick.
GhostShield has one Australian location, Sydney. There is no test log showing Stan accepting it, and Stan says it blocks VPNs, so this page does not promise that it works. The route Stan supports for travel is downloads: most of the catalogue can be downloaded on an iPhone or iPad (iOS 15 or later) or an Android phone or tablet (Android 5.0 or later) and watched offline anywhere (Stan, downloads). Laptops and desktops cannot download.
If you are moving abroad rather than travelling, Stan asks you to contact its support team to cancel, because the service cannot be used outside Australia.