The following syntax in the profile text will cause the filter to be case insensitive: (?i)textToFilter (i.e, start the filter with parenthesis-question mark-lowercase "i"-parenthesis followed by the filter text).
For example, a name of (?i)USER* will find USER123, User123, uSeR123, etc.
Also to include a dot character in the name filter, for example to find any name that starts with svc. and not svc_ in the name, add the back slash character \ before the dot character which will escape the dot and include it as a text in the filter such as below:
This will find any account that starts with svc. in the name.