So the condition field uses Python and the code you can write in here is
exactly what is allowed inside any “condition” in Python (like in if condition).
This is the same reason why multiple lines wont work, as python doesnt accept linebreaks in conditions without escapes.
If the conditions are many, then you will have to use and, or or or others like below, without linebreaks:
a==b and b!=c or c!=a and c>b
With escapes:
a==b and b~=c \
or c!=a and c>b