Homer 7 WebApp - NOT filter

[Alex]

Hi,

Been searching around cannot seem to find an answer/solution for this: 
How to create a NOT filter in the Homer7 webapp? 
and can you do a NOT multiple search criteria? 

For example: 
where sourceIP NOT starts with 10. or 192.

The strings tried, but no joy: 
!10%
!10%;192%
NOT10% 
NOT(10%)

Any advise would be greatly appreciated.

Thanks.

Alex.