How to filter results by srcid when it is arbitrary text

[The Branches]

Carter,

I'm assigning 3-4 character textual labels as the srcid values for argus 
records corresponding to different sniffing interfaces and it is working 
quite nicely.   One thing I have not been able to figure out yet is how 
to reference the srcid in a filter expression when it is arbitrary 
text.  I've tried a variety of ways to do this, like:

ra -r argus.out - "srcid eth2"
ra -r argus.out - srcid "eth2"
ra -r argus.out - srcid \"eth2\"
ra -r argus.out - "srcid 'eth2'"
ra -r argus.out - "srcid \'eth2\'"

but I always get back a syntax error complaining about the eth2 part.  
It seems to consider any kind of single or double quote usage around the 
eth2 part as an illegal character situation, but without using quotes it 
tries to resolve eth2 to an IP number.

No press on this.  My argus records from different source interfaces 
drop into different filenames corresponding to the srcid anyway.  
Eventually it would be nice to filter by srcid when it is arbitrary text.

Kevin