It might be messy but you could create another input that loads based on the radio button that sets its variable to the REGEX that you would want to run, then, you pass that input's variable into the regex pipe.
For example
base search | if STATUS==$token_radiobutton$,regex1,regex2 | table extracted fields from regex
Set the input's token value to the field STATUS
Then on the dashboard
base search | regex $STATUS_TOK$ |
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