Hi @anon89270182 and welcome to the forum!
I don’t believe so. This is the only example I’ve seen of filtering on custom fields:
// Only custom field changes on tasks and comments being added
"filters": [
{
"resource_type": "task",
"action": "changed",
"fields": ["custom_fields"]
},
{
"resource_type": "story",
"resource_subtype": "comment_added",
"action": "added"
}
]
I’ve never seen one. @Ross_Grambo, is this something you guys could work toward adding? It would be great!