XML search form - Allow wildcard only for specific dropdown input

Below search form - prevent the user from entering "wildcard " inputs in the text field. - if user entera any wildcard or blank value in text field - it will show error message. Now, in this form I wanted to allow the user to do wildcard searches when the dropdown input value is only "audit"

Text Box validation

TypefalseauditsplunkdEnter Log Level (like INFO, WARN, ERROR, FATAL case(len($value$)>0 AND NOT like($value$,"%*%"),$value$)

Log Level does not accept asterix (*)!!!

index="_internal" sourcetype=$dropdown_input$ log_level="$tokLogLevel$" | stats count by log_level | appendpipe [| makeresults | eval log_level="$tokLogLevel$",count=0 | fields - _time] | dedup log_level-24h@hnow120nonecellfalsefalsefalsetrue