Starting from LLBLGen Pro v.3.0 you can create your model as you like, and you can decide the mappings to the underlying database as you wish too.
Having an entity mapped to more than one table is not recommended. So we only map one entity to one table or view. Although a table can be mapped to more than one entity.
If you want to display data (read only) from more than one table, you can create a TypedList in the Designer.