Can We Adjust Filter Pane Object In Qlik Sense To Show Only One Field Separately A Time?

Yes, we can do it. By clicking on Add-Ons >> Data Handling >> Calculation Condition expression box. 

You can do this only on the chart which you wanted to limit on one selection. For one sheet, you have to do the same thing for all the charts that are on the sheet. 

You need to return 1 or 0 for this expression as far as I know, so here is an example:

If(GetSelectedCount([Field]) = 1

 ,1

 ,0 

)