Good Morning Milan.
As in answer to your request/question, please check the below:
You can use the advance search feature to construct the search condition to find the requests whose request_for or request_by are inactive.
Regarding Advance search:
In the dropdown, it has "Request For User Status" (also "Request By User Status" ).
In your search, you can use it and set it as inactive in the search condition to find the requests that you want.
Please also check this tecdoc:
http://www.ca.com/us/services-support/ca-support/ca-support-online/knowledge-base-articles.tec1732245.html
Kind regards, Louis.