In MS excel can be set only one real filter. To have more then one on a Worksheet, you have to use format templates. Format templates uses pivot tables to realize the multifilter behavior.
PHPspreadsheet uses the table filtering and overrides the filtering every time by use of the setAutoFilter method. That means onlyone per worksheet is posible.
There is at the Moment no support of pivot tables in PHPspreadsheet.
At the moment it is not possible to have more the one filtered table in one worksheet.