@Ajilakes
Okay...let's review a few things here:
1) Have to state this in case you are not aware...filtering and hiding data from your SharePoint list does NOT keep people from actually accessing the information in other records. Although your App may obscure the data, the fact that a user has to have access to the list to be able to read and write to it means that they have access to every record. IF you want to control this, the only option you have in SharePoint is to enable Item-Level permissions in the SharePoint list advance settings. However, this changes the list.
2) Your filter, regardless, is not working properly. Let's try a couple things:
a. change the filter part of your formula so we're comparing apples to apples to the following:
..lumns(Search(Filter('Job Requisition Form List', Lower('Created By'.Email) = Lower(UserEmail)), TextInputSear...
b. Place another test label in your gallery and set the text to : ThisItem.'Created By'.Email
c. Place a test label somewhere on your screen and set the text to: UserEmail
What we're looking for is (hopefully success in a.) a list that shows the created by column and another label that shows the user email value you have in your variable. Compare those two and make sure things look proper.
Let's start with that and see where that leads us.