Yes, that one is a nationwide and very temporary measure specifically targeted to prevent the traditional large-scale movements and gatherings associated with All Saints' Day / All Souls' Day, which have particular significance in Portugal.
It's mentioned on the first link :
Travel within Portuguese territory / Border restriction
There are no specific restrictions on mobility to cross land borders.
In Portuguese continental territory, a restriction on the movement of citizens outside the usual municipality of residence was determined between 0:00 on October 30 and 06:00 on November 3, except for health reasons and for reasons of imperative urgency.
This restriction does not apply to several situations, including:
- performance of professional activities (if accompanied by a statement from their company or by a declaration under honour);
- attendance of schools, daycare centres and leisure activities;
- training, tests and exams and inspections;
- participation in legal acts and attendance at public services, if proof of appointment is provided;
- travel required to leave mainland Portugal;
- travel by non-resident citizens to places of proven residence or hotel reservation;
- trips to watch cultural shows with ticket already bought, provided they are in municipalities
bordering to the usual residence or in the same Metropolitan Area;
- return to usual residence.