So you want to filter the whole view or an element to only display data form the current month dynamically?
I do this by adding a column to the data set "FilterYearMonth" for example.
Set the column =IF(YEAR([Date Column])&MONTH([Date Column]) = YEAR(NOW())&MONTH(NOW()), 1, 0)
Then filter the whole view or element to only display when "FilterYearMonth" = 1