Is there a way that I can construct a search that will pass a list of values to a field that is expecting just one value?

Hello, I have a custom command from an app where I can do a search like `sourcetype=mysourcetype | customcommand ioc=1.1.1.1` If I try to do something like `sourcetype=mysourcetype | dedup src_ip | customcommand ioc=src_ip` I get an error, as the command is expecting a defined format/value for the ioc parameter. Is there anyway I can achieve sending the src_ip values, one by one, to the customcommand? Thanks in advance for your help. PS: is there a better way to get the unique src_ip value, besides `dedup` ?