Hi Mamy,
Greetings from Syncfusion support.
We checked your query and would like to let you know that the Grid’s filtering functionality works on basis of comparing the filtered data with the corresponding column field data in the underlying data source which is bound to the grid. So even if individual columns values are split and displayed in the checkbox filter, the filtering will be performed based on the column value present in the data source. This is the Grid’s default behavior.
From this – “The content of the user column is the concatenation of all users converted to strings”, please let us know if the column data(‘User’ column) is present as the concatenated string in the underlying data source or if different column values are concatenated to display it.
Let us know if you have any concerns.
Regards,
Sujith R