Support for 2 different Citrix farms on one Virtual Server

in principle you should be able to handle both cases in one irule if the irule can take the chosen group into account. you can trigger an irule event and irules can look into APM variables.

https://support.f5.com/kb/en-us/products/big-ip_apm/manuals/product/apm_config_10_2_0/apm_config_irules.html122471

the correct SSO profile can be selected from that iRule

https://devcentral.f5.com/wiki/iRules.WEBSSO__select.ashx