Dear Artur, 

You can bind a record of the <SectionName>Folder (e.g. ContactFolder) with the filter: name = "Your folder's name", and bind records from <SectionName>InFolder (e.g. ContactInFolder) with FolderId = Id of the folder chosen above. 

Here is an academy page for data binding: 

https://academy.creatio.com/documents/technic-sdk/7-15/binding-data-packages

Best regards, 

Dennis