attendanceStatus:any;
   staffAttendanceList: StaffAttendance[] = [
      status:false,
      staff:{
       staffId:"ERP1001",
       firstName:'Rahul',
       lastName:'Sharma'
       }
     ];

2)In HTML:

<input  [(ngModel)]="searchStaffAttendance" type="text">

        <table>
          <tbody>
            <tr*ngFor="let staffAttendance of staffAttendanceList|filter:searchStaffAttendance:'staff.staffId';
            index as i">
              <td>{{i+1}}</td>
              <td>{{staffAttendance.staff.staffId}}
              </td>
              <td>{{staffAttendance.staff.firstName}}
               {{staffAttendance.staff.lastName}}</td>
            </tr>
          </tbody>
        </table>

3)In Filter pipe:

import { PipeTransform, Pipe } from "@angular/core";

@Pipe({
    name:'filter'
})
export class FilterPipe implements PipeTransform {
    transform = (value:[],filterString:any,propName:any):any => {
        let inputValue = [];
        if(filterString === undefined || filterString === '' ||
           value.length == 0){
            return value;
        }
        for(const item of value){
            if(item[propName] === filterString){
                inputValue.push(item);
            }
        }
        return inputValue;
    }
}