I am filtering sharepoint list using query string for some reson i need to check condition like FieldValue!=Red is that possible to achive?
Or still its limitation?<
You can't AFAIK.
The workaround MAY be to create a calculated column and then filter on that.
E.g. create a column called "Not-Red" with formula
=IF([YOUR_COLUMN_NAME]="Red","False","True")
Then filter
?FilterField1=Not-Red&FilterValue2=True
You could use Sharepoint Designer to filter a new, dedicated view of that list. You need: 1) a queryString parameter like ?FilteredNotValue!=Red 2) Add filter in designer , operator = "Not Equal" , value = new parameter --> Name param = FilteredNotValue! --> Parameter Source = QueryString. Ending the name of the param with "!" is a trick but it seems could do the work.