Is it possible to practice Ambitions Professions if your Sims live in WA foreign lands?
And a little off topic, is it possible to create Sims that have accents?
No, there are no job opportunities while your Sim is on vacation. The work tab in the user interface won't even be active while you're away.
As for accents, no on that one, too. You can choose the pitch and tone of your Sim's voice, but it will always be the same accent.