Immigrant means a foreign person who moved to your country.
Emigrant means a person from your country who moved to another country.
Emigrants (Portuguese nationals outside Portugal) can vote in Portuguese elections, they have their own Hondt "circle".
Immigrants (foreigners who move to Portugal) can't vote in national elections, unless they obtain nationality.
I understand, I was not saying you couldn't be both, I'm talking in the context of national elections. The confusion might have started because the original poster you replied to was talking about Emigrants from the Netherlands, not Immigrants to the Netherlands (who would be considered Emigrants in their country of origin).