[ol][li]If you can (depending on your database, driver and CR version), create a SQL Expression that substrings the first character of your data field[/li]
[li]Format your record selection statement like this:
{%SQLExpression} = '*'[/li][/ol]If you aren't concerned about performance at all, then you can simply use the following select statement:
Left({table.fieldname},1) = '*'