The official website for The Settlers of Catan

Question about Domaine Influence Cards - General - May I use a multiple-expansion / multiple-knight action card for exactly 1 or for various of my Domains (the latter meaning that I may split up the actions)?

Answer

The multiple-expansion card must be used for exactly 1 Domain (although you may expand at two different places in a Domain, by 1 space each); the multiple-knight card actions may also be split up.