Bake cake layers per box directions in two 8-inch pans. Cool completely on racks.
Whip cream until you can form soft peaks. Mix in the cream cheese and beat in sugar until there are no lumps.
Combine half of the mousse with the strawberry puree. For the other half, use 1 teaspoon of gel color and fold into the lemon curd to create a pale blue or pink color.
Level one layer of cake. In the center of the layer, spoon alternating dollops of strawberry mousse and lemon mousse in rows.
Gently press down the second layer. For a thin finish, smooth out the remaining mousse from the edges of the cake.
Refrigerate for 2 hours before cutting so the pockets maintain their shape.