JqGrid custom filtering with integrated filtering panel

I am using the latest version of jqGrid and I am wondering if it is possible to perform local filtering using custom rules (see example below). First of all, the filter toolbar can be enabled by applying

jQuery("#grid").jqGrid('filterToolbar', options);

In the past, I implemented this manually (the version currently used does not support local filtering, so I added this function according to my needs), and now, after upgrading to the latest version, I asked myself if jqGrid offers this by default (not local filtering, not user-defined filtering rules), as the functionality has increased dramatically in recent months. I read the documentation and searched the internet, but did not find a suitable example.

Here is an example of what I want to achieve.

There is a column First Namein which the first name of the displayed faces is recorded.

Stefan
Stephan
Stephano
Stelios
Philip
Phillip
Philipp
Ivan
Iwan
...

Now the user enters Stethe filter panel for the column First Name, and the result with the default filter algorithm should be :)

Stefan
Stephan
Stephano
Stelios

So far so good. But what if I want to display names similar to orthographically? I want the user to enter Ste*an*only for display

Stefan
Stephan
Stephano

So, you see, *means a wildcard for any character zero or more times. In addition, I want the user to be able to enter Ste?an*, which led to

Stefan

? . , ( , ), , , .. e*o

Stephano
Stelios

*, .