Is there a function I can use to identify which Appian instance a process is run

We have a rule named along the lines of isDevelopmentEnvironment, which looks something like this:

= with(
local!siteURL: lower(
rule!APN_getSiteUrl()
),
or(
find(
"dev",
local!siteURL
),
find(
"test",
local!siteURL
)
)
)

In case you don't have the Appian common objects installed, the rule APN_getSiteUrl just does extract(linktodocument(0, "doc"), """", "doc/")

Obviously this relies on your environments having some element of the URL that allows you to identify the environment...

We have a rule named along the lines of isDevelopmentEnvironment, which looks something like this:

= with(
local!siteURL: lower(
rule!APN_getSiteUrl()
),
or(
find(
"dev",
local!siteURL
),
find(
"test",
local!siteURL
)
)
)

In case you don't have the Appian common objects installed, the rule APN_getSiteUrl just does extract(linktodocument(0, "doc"), """", "doc/")

Obviously this relies on your environments having some element of the URL that allows you to identify the environment...